html,JS search field list

html,JS search field list - javascript

I'm new to JS but have good knowledge in C and HTML and want to create a search box so that when I write something, a drop-down list appears with some results. I already have the code to create the animated search field (which is not mine) and the code to create this search filter list but I don't know how to "connect" them.
Here is the JS part for the search bar filter: (To use it you just need this html code
<input type="text" id="searchInput" placeholder="Search article"/> here is the fiddle: https://jsfiddle.net/c30L5esq/)
$("#searchInput").on('keyup', function() {
var searchValue = $(this).val().toUpperCase();
if(searchValue.length > 0) {
searchAndFilter(searchValue);
} else {
$("#articlesearch li").hide();
}
});
function searchAndFilter(searchTerm) {
$("#articlesearch li").each(function() {
var currentText = $(this).text().toUpperCase();
if (currentText.indexOf(searchTerm) >= 0) {
$(this).show();
} else {
$(this).hide();
}
});
}
$(document).ready(function() {
$("#articlesearch li").hide();
});
And here it is the link for the search bar fullscreen animation :
https://codepen.io/suez/pen/obpLvy/
And what I want is that when I use this search bar animation, I can actually search through a list and it will show me results that match what I typed in a dropdown.
Thank you !

$(document).ready(function() {
var list = $("#articlesearch>li");
list.hide();
$(document).on('input', "#searchInput", function() {
/* searchAndFilter($(this).val()) */
list.hide();
var searchTerm = ($(this).val() + '').toUpperCase();
if (searchTerm.length > 0) {
list.each(function() {
var currentText = $(this).text().toUpperCase();
if (currentText.indexOf(searchTerm) >= 0) {
$(this).show();
} else {
$(this).hide();
}
});
}
});
});
Jsfiddle: https://jsfiddle.net/ravinila/ghovnzty/13

I think you are looking for is autocomplete for search input. For that we have to use typeahead.js plugin. You can go with the link on the plugin and Codepen example link. There are multiple example demos in the link.
var substringMatcher = function(strs) {
return function findMatches(q, cb) {
var matches, substringRegex;
// an array that will be populated with substring matches
matches = [];
// regex used to determine if a string contains the substring `q`
substrRegex = new RegExp(q, 'i');
// iterate through the pool of strings and for any string that
// contains the substring `q`, add it to the `matches` array
$.each(strs, function(i, str) {
if (substrRegex.test(str)) {
matches.push(str);
}
});
cb(matches);
};
};
var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
];
$('#the-basics .typeahead').typeahead({
hint: true,
highlight: true,
minLength: 1
},
{
name: 'states',
source: substringMatcher(states)
});
<div id="the-basics">
<input class="typeahead" type="text" placeholder="States of USA">
</div>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/typeahead.js/0.11.1/typeahead.jquery.min.js"></script>

Related

Why is my sorting algorithm not sorting correctly?

I was given this sorting function in the best answer to a question I posted. It worked on the example data, but does not appear to work on my actual data and I am not sure why.
My data can be see here: JSON
It's an object of objects like this:
"Montana": {
"superiors": [
"Massachusetts",
"Oklahoma",
"New Mexico"
],
"inferiors": [
"North Carolina"
]
}
It exists to instruct the sorting function. Here, Montana must be higher up in the list than North Carolina. But below Massachusetts, Oklahoma, and New Mexico (nothing to do with geography by the way).
Note to avoid confusion:
This has nothing to do with the order of object keys.
But the sorting isn't being followed precisely (it's mostly followed though). For example, states['North Carolina'].superiors.includes('Ohio') === true so why is 'Ohio' listed beneath 'North Carolina'?
fetch('https://api.npoint.io/7571e85ef470a2a7f189')
.then(data => data.json())
.then(states => {
function mySort(arr) {
const scores = Array(arr.length).fill(0);
for (let i = 0; i < arr.length; i++) {
for (let j = 0; j < arr.length; j++) {
if (i === j) continue;
const a = arr[i];
const b = arr[j];
if (states[a].inferiors.includes(b) || states[b].superiors.includes(a)) scores[j]++;
else if (states[b].inferiors.includes(a) || states[a].superiors.includes(b)) scores[i]++;
}
}
// Sort arr by scores:
return arr.map((val, i) => [scores[i], val])
.sort((a, b) => a[0] - b[0])
.map(pair => pair[1]);
}
const names = Object.keys(states);
console.log(mySort(names));
/*
[
'Tennessee', 'Oklahoma', 'Alaska',
'Wisconsin', 'Arkansas', 'New York',
'Nevada', 'Montana', 'Georgia',
'Massachusetts', 'Hawaii', 'Connecticut',
'California', 'Kansas', 'Utah',
'North Dakota', 'New Mexico', 'Nebraska',
'Pennsylvania', 'Louisiana', 'New Jersey',
'Arizona', 'Colorado', 'Maryland',
'Oregon', 'Missouri', 'Virginia',
'Rhode Island', 'Mississippi', 'South Carolina',
'Illinois', 'Texas', 'Florida',
'Washington', 'District of Columbia', 'Kentucky',
'Minnesota', 'Iowa', 'Alabama',
'New Hampshire', 'Idaho', 'South Dakota',
'Indiana', 'Michigan', 'North Carolina',
'Ohio'
]
*/
// states['North Carolina'].superiors.includes('Ohio') === true
// so why is 'Ohio' listed beneath 'North Carolina'?
});
Here is the JSON data in case the data in my link gets vandalized:
{"Iowa":{"inferiors":[],"superiors":["Alaska","Oklahoma","California","Hawaii","New Jersey","Virginia","Florida","Washington","Minnesota","Texas","Idaho","Alabama","Ohio"]},"Ohio":{"inferiors":["North Carolina","Michigan","Iowa","New Hampshire"],"superiors":["New York","California","Arizona","Illinois","Texas","Pennsylvania","Florida","Indiana","Tennessee","Massachusetts","Washington","Colorado","District of Columbia","Maryland","Kentucky","Oregon","Oklahoma","Wisconsin","Nevada","New Mexico","Missouri","Virginia","Georgia","Nebraska","Minnesota","Louisiana","Hawaii","Alaska","New Jersey","Idaho","Alabama","Arkansas","Utah","Rhode Island","Mississippi","South Carolina","Connecticut","Montana","Kansas","North Dakota","South Dakota"]},"Utah":{"inferiors":["Idaho","South Dakota","Ohio","Michigan"],"superiors":["New York"]},"Idaho":{"inferiors":["Ohio","Iowa","South Dakota","Michigan","North Carolina"],"superiors":["Alaska","Oklahoma","California","Hawaii","Minnesota","New Jersey","Virginia","Florida","Washington","Texas","New York","Louisiana","Illinois","Arkansas","Utah","Rhode Island","Mississippi","Maryland","Nebraska","District of Columbia","Kentucky","Connecticut"]},"Texas":{"inferiors":["North Carolina","Michigan","Ohio","Indiana","Idaho","Alabama","Iowa"],"superiors":["New York","California","Tennessee","Massachusetts","Oklahoma","Wisconsin","Nevada","New Mexico","Alaska","Hawaii"]},"Alaska":{"inferiors":["California","Hawaii","New Jersey","Virginia","Florida","Washington","Minnesota","Texas","Idaho","Alabama","Ohio","Iowa","New Mexico","Mississippi","Rhode Island","North Dakota","South Carolina","District of Columbia","Colorado","Arizona","Kentucky","New Hampshire","Oregon","Nebraska","Illinois","Indiana","South Dakota","North Carolina"],"superiors":["Tennessee"]},"Hawaii":{"inferiors":["Minnesota","Kentucky","Washington","Pennsylvania","Illinois","Georgia","Maryland","Ohio","New Jersey","Virginia","Florida","Texas","Idaho","Alabama","Iowa","Mississippi","Rhode Island","North Dakota","South Carolina","District of Columbia","Colorado","Arizona","New Hampshire","Missouri","Utah","Louisiana","Michigan"],"superiors":["New York","Tennessee","Oklahoma","Alaska","Nevada"]},"Kansas":{"inferiors":["Indiana","North Carolina"],"superiors":["Wisconsin","New York","California"]},"Nevada":{"inferiors":["California","New Mexico","Illinois","Texas","Missouri","Virginia","District of Columbia","Ohio","North Carolina","Michigan","Maryland","Colorado","Arizona","Oregon","Indiana","Kentucky","Louisiana","Florida","Hawaii","Massachusetts","South Carolina","Mississippi","Minnesota","North Dakota","New Hampshire","Rhode Island","Washington","Utah","New Jersey","Nebraska","Alabama","South Dakota"],"superiors":["Tennessee","Oklahoma","Wisconsin"]},"Oregon":{"inferiors":["Ohio","Indiana","North Carolina","Michigan","Alabama","South Dakota"],"superiors":["New York","Tennessee","Massachusetts","Oklahoma","Wisconsin","California","Nevada","Alaska"]},"Alabama":{"inferiors":["Ohio","Iowa","North Carolina"],"superiors":["Tennessee","Nevada","Alaska","Nebraska","New Mexico","New Jersey","Kentucky","Oregon","Rhode Island","Illinois"]},"Arizona":{"inferiors":["Indiana","Ohio","North Carolina","Michigan","New Hampshire"],"superiors":["California","New York","Tennessee","Massachusetts","Wisconsin","Nevada","New Mexico","Alaska","Hawaii"]},"Florida":{"inferiors":["Indiana","Ohio","North Carolina","Michigan","Iowa","Idaho","South Dakota"],"superiors":["Tennessee","New York","Massachusetts","Wisconsin","California","New Mexico","Oklahoma","Nevada","Alaska","Hawaii"]},"Georgia":{"inferiors":["Ohio"],"superiors":["Tennessee","New York","Oklahoma"]},"Indiana":{"inferiors":["Ohio","North Carolina","Michigan","South Dakota"],"superiors":["New York","California","Arizona","Illinois","Texas","Pennsylvania","Florida","Oklahoma","Tennessee","Wisconsin","Oregon","District of Columbia","Maryland","Virginia","Washington","Missouri","Nebraska","Colorado","Kansas","Kentucky","Nevada","Louisiana","New Mexico","Minnesota","Rhode Island","Connecticut","Mississippi","Alaska","New Jersey"]},"Montana":{"inferiors":["North Carolina"],"superiors":["Massachusetts","Oklahoma","New Mexico"]},"Arkansas":{"inferiors":["South Dakota","Ohio","Michigan"],"superiors":["New York","California"]},"Colorado":{"inferiors":["Ohio","Michigan","North Carolina"],"superiors":["New York","Tennessee","Massachusetts","Wisconsin","California","Nevada"]},"Illinois":{"inferiors":["Indiana","Ohio","Michigan","South Dakota","Alabama","North Carolina"],"superiors":["New York","California","Tennessee","Massachusetts","Oklahoma","Wisconsin","Nevada","New Mexico","Hawaii"]},"Kentucky":{"inferiors":["Ohio","Indiana","Michigan","North Carolina","Idaho","South Dakota","New Hampshire"],"superiors":["New York","Tennessee","Massachusetts","Wisconsin","Nevada","California","Oklahoma","Hawaii","New Mexico","Alaska"]},"Maryland":{"inferiors":["Ohio","North Carolina","Michigan","Indiana","Idaho","South Dakota"],"superiors":["New York","Tennessee","Massachusetts","Oklahoma","California","Wisconsin","Nevada","New Mexico"]},"Michigan":{"inferiors":[],"superiors":["Florida","New York","California","Illinois","Texas","Pennsylvania","Arizona","Tennessee","Oklahoma","Wisconsin","Nevada","New Mexico","District of Columbia","Missouri","Virginia","North Carolina","Ohio","Washington","Georgia","Maryland","Nebraska","Colorado","Indiana","Oregon","Louisiana","Kentucky","Massachusetts","Hawaii","Rhode Island","Mississippi","Utah"]},"Missouri":{"inferiors":["Ohio","North Carolina","Michigan","Indiana"],"superiors":["Tennessee","Oklahoma","Wisconsin","California","Nevada","New Mexico","New York","Massachusetts","Hawaii"]},"Nebraska":{"inferiors":["Ohio","North Carolina","Michigan","Indiana","Idaho","South Dakota","Alabama"],"superiors":["New York","Tennessee","California","New Mexico","Oklahoma","Nevada","Alaska"]},"New York":{"inferiors":["California","Illinois","Texas","Pennsylvania","Arizona","Florida","Indiana","Ohio","North Carolina","Michigan","Washington","Colorado","District of Columbia","Maryland","Kentucky","Oregon","Massachusetts","New Mexico","Minnesota","Missouri","Nebraska","Virginia","Kansas","Louisiana","Georgia","Hawaii","Arkansas","Utah","Rhode Island","Mississippi","Idaho","South Dakota","South Carolina","New Jersey","Connecticut","New Hampshire"],"superiors":["Wisconsin","Tennessee","Oklahoma"]},"Oklahoma":{"inferiors":["Nevada","California","New Mexico","Illinois","Texas","Missouri","Virginia","District of Columbia","Ohio","North Carolina","Michigan","Wisconsin","Oregon","Maryland","Washington","Indiana","New York","Hawaii","Minnesota","Kentucky","Pennsylvania","Georgia","Florida","Louisiana","Idaho","South Dakota","Nebraska","Rhode Island","Connecticut","Mississippi","South Carolina","New Jersey","New Hampshire","Montana","Kansas"],"superiors":["Tennessee"]},"Virginia":{"inferiors":["Ohio","North Carolina","Michigan","Indiana","Iowa","Idaho","South Dakota"],"superiors":["Tennessee","Oklahoma","Wisconsin","California","Nevada","New Mexico","New York","Alaska","Hawaii"]},"Louisiana":{"inferiors":["Indiana","Ohio","Michigan","Idaho","South Dakota"],"superiors":["Nevada","New York","California","Tennessee","New Mexico","Oklahoma"]},"Minnesota":{"inferiors":["Ohio","North Carolina","Idaho","Alabama","Iowa","South Dakota","Michigan","Indiana","New Hampshire"],"superiors":["Wisconsin","New York","California","Massachusetts","New Mexico","Tennessee","Oklahoma","Hawaii","Alaska","Nevada"]},"Tennessee":{"inferiors":["Illinois","Washington","Florida","Colorado","District of Columbia","Texas","Maryland","Kentucky","Oregon","Arizona","Ohio","Oklahoma","Wisconsin","Nevada","California","New Mexico","Missouri","Virginia","North Carolina","Michigan","Georgia","Nebraska","Indiana","Pennsylvania","New York","Hawaii","Minnesota","Louisiana","Rhode Island","Mississippi","Utah","Alaska","New Jersey","Alabama","South Dakota"],"superiors":[]},"Wisconsin":{"inferiors":["Nevada","California","New Mexico","Illinois","Texas","Missouri","Virginia","District of Columbia","Ohio","North Carolina","Michigan","Oregon","Maryland","Washington","Indiana","Massachusetts","Pennsylvania","Florida","Minnesota","New York","Kansas","Arizona","Kentucky","Colorado"],"superiors":["Oklahoma","Tennessee"]},"California":{"inferiors":["Illinois","Texas","Pennsylvania","Arizona","Florida","Indiana","Ohio","North Carolina","Michigan","Missouri","Virginia","District of Columbia","Oregon","Maryland","Washington","Massachusetts","New Mexico","Minnesota","Nebraska","Colorado","Kansas","Kentucky","Louisiana","New Jersey","Idaho","Alabama","Iowa","Arkansas","Utah","Rhode Island","Mississippi","South Dakota","South Carolina","Connecticut","New Hampshire"],"superiors":["New York","Tennessee","Oklahoma","Wisconsin","Nevada","Alaska"]},"New Jersey":{"inferiors":["Iowa"],"superiors":["Alaska","Oklahoma","California","Hawaii","New York","New Mexico","Tennessee","Nevada"]},"New Mexico":{"inferiors":["Illinois","Texas","Missouri","Virginia","District of Columbia","Ohio","North Carolina","Michigan","Pennsylvania","Florida","Minnesota","Indiana","Kentucky","Louisiana","Arizona","Washington","Nebraska","Maryland","South Carolina","New Jersey","Rhode Island","Connecticut","New Hampshire","Mississippi","North Dakota","Colorado","Montana","Kansas","Oregon","Alabama","South Dakota"],"superiors":["Wisconsin","Tennessee","Oklahoma","New York","California","Nevada","Alaska"]},"Washington":{"inferiors":["Ohio","North Carolina","Michigan","Indiana","Iowa"],"superiors":["Tennessee","New York","Massachusetts","California","Oklahoma","Wisconsin","New Mexico","Hawaii","Alaska","Nevada"]},"Connecticut":{"inferiors":["Idaho","Indiana","South Dakota","North Carolina","Ohio","New Hampshire"],"superiors":["New York","Oklahoma","New Mexico","Massachusetts"]},"Mississippi":{"inferiors":["Idaho","South Dakota","Ohio","Michigan","Indiana","North Carolina","New Hampshire"],"superiors":["Alaska","Tennessee","Hawaii","New Mexico","Nevada","Massachusetts"]},"North Dakota":{"inferiors":["Ohio","New Hampshire"],"superiors":["Alaska","Tennessee","Hawaii","New Mexico","Nevada","Massachusetts"]},"Pennsylvania":{"inferiors":["North Carolina","Michigan","Indiana","Ohio","New Hampshire"],"superiors":["New York","California","Wisconsin","New Mexico","Massachusetts","Tennessee","Oklahoma","Hawaii"]},"Rhode Island":{"inferiors":["Idaho","South Dakota","Ohio","Michigan","Indiana","North Carolina","New Hampshire","Alabama"],"superiors":["New York","Oklahoma","New Mexico","California","Alaska","Tennessee","Hawaii","Nevada","Massachusetts"]},"South Dakota":{"inferiors":["Ohio","North Carolina"],"superiors":["New York","California","Illinois","Arkansas","Louisiana","Minnesota","Utah","Rhode Island","Florida","Mississippi","Maryland","Idaho","Oklahoma","Nebraska","District of Columbia","Kentucky","Connecticut","Virginia","Indiana"]},"Massachusetts":{"inferiors":["Illinois","Washington","Florida","Colorado","District of Columbia","Texas","Maryland","Kentucky","Oregon","Arizona","Ohio","Pennsylvania","Minnesota","Indiana","North Carolina","Montana","Connecticut","Rhode Island","Kansas","South Carolina","Mississippi","North Dakota","New Hampshire","Missouri","Utah","Louisiana","Michigan"],"superiors":["Wisconsin","New York","California","Nevada","Tennessee"]},"New Hampshire":{"inferiors":[],"superiors":["Oklahoma","New York","New Mexico","California","Pennsylvania","Maryland","South Carolina","Virginia","New Jersey","Rhode Island","Connecticut","Alaska","Nevada","Hawaii","Massachusetts","Mississippi","Minnesota","Arizona","North Dakota","Kentucky","Ohio"]},"North Carolina":{"inferiors":["Michigan"],"superiors":["New York","California","Texas","Illinois","Pennsylvania","Arizona","Florida","Indiana","Ohio","Wisconsin","Tennessee","Oklahoma","New Mexico","Nevada","Washington","Georgia","District of Columbia","Missouri","Maryland","Nebraska","Massachusetts","Minnesota","Colorado","Oregon","Virginia","Kentucky","Rhode Island","Connecticut","Mississippi","Idaho","Montana","Kansas","Alaska","New Jersey","Alabama","South Dakota"]},"South Carolina":{"inferiors":["New Hampshire"],"superiors":["Oklahoma","New York","New Mexico","California","Alaska","Tennessee","Hawaii","Nevada","Massachusetts"]},"District of Columbia":{"inferiors":["Ohio","North Carolina","Michigan","Indiana","Idaho","South Dakota"],"superiors":["New York","Tennessee","Massachusetts","Wisconsin","Oklahoma","California","Nevada","New Mexico","Alaska","Hawaii"]}}

You have a partial order only not a total order (not all states list all others in their superiors/inferiors list), so your score calculation doesn't work. States end up with a score depending on how often they were mentioned, not what their relative order is. You'll need to implement a topological sort algorithm.

Your data doesn't contain contradictions, but it certainly doesn't list everything correctly.
Example: Iowa-Oklahoma pair. Oklahoma is listed as being superior to Iowa, but Iowa is not listed as being inferior to Oklahoma.

Typehead.js dropdown does not appear

I have been trying to get typehead.js library to work on a dropdown list that pulls from a mysql database for a while but it has not worked. I decided to try the basics first and tried to populate the dropdown from a simple array instead of a database as shown in the typehead.js docs examples.
I created this codepen but I havent been able to get the dropdown working over there as well.
I copied the typehead.js lib to the JS section of codepen. Here is my HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Typehead</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script
src="http://code.jquery.com/jquery-3.3.1.js"
integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60="
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-3-typeahead/4.0.2/bootstrap3-typeahead.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<style>
.typeahead { z-index: 1051; }
</style>
</head>
<body>
<div id="the-basics">
<input class="typeahead" type="text" placeholder="States of USA">
</div>
<script>
var substringMatcher = function(strs) {
return function findMatches(q, cb) {
var matches, substringRegex;
// an array that will be populated with substring matches
matches = [];
// regex used to determine if a string contains the substring `q`
substrRegex = new RegExp(q, 'i');
// iterate through the pool of strings and for any string that
// contains the substring `q`, add it to the `matches` array
$.each(strs, function(i, str) {
if (substrRegex.test(str)) {
matches.push(str);
}
});
cb(matches);
};
};
var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
];
$('#the-basics .typeahead').typeahead({
hint: true,
highlight: true,
minLength: 1
},
{
name: 'states',
source: substringMatcher(states)
});
</script>
</body>
The drop down list does not appear at all.

Seems the copy paste script might have been broken in your case. Just import it from a CDN like this
<script src="http://twitter.github.io/typeahead.js/releases/latest/typeahead.bundle.js">
</script>
Checkout this codepen

Why is typeahead matching periods?

I am using the same code from the typeahead example here. However if you type in a period . the dropdown will appear with matches. Is all this code above the array definition necessary? Is there an easier way to accomplish the same thing where you won't get matches for periods if there are no periods in your array?
I see the bloodhound example below it accomplishes the same thing and doesn't match periods but is it using var states to define an array and then using var states to construct a new bloodhound engine is this a mistake?
Copied code from the website:
var substringMatcher = function(strs) {
return function findMatches(q, cb) {
var matches, substringRegex;
// an array that will be populated with substring matches
matches = [];
// regex used to determine if a string contains the substring `q`
substrRegex = new RegExp(q, 'i');
// iterate through the pool of strings and for any string that
// contains the substring `q`, add it to the `matches` array
$.each(strs, function(i, str) {
if (substrRegex.test(str)) {
matches.push(str);
}
});
cb(matches);
};
};
var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
];
$('#the-basics .typeahead').typeahead({
hint: true,
highlight: true,
minLength: 1
},
{
name: 'states',
source: substringMatcher(states)
});
In my case I am generating an array of tags so instead of the states I am using var tags = <%= raw Tag.all.pluck(:name) %>;

You may find indexOf to be more useful than a regex for your application.
if (haystack.indexOf(needle) != -1) {
/* needle is in haystack */
}
or, case insensitively:
if (haystack.toLowerCase().indexOf(needle.toLowerCase()) != -1) {
}
something like this:
function findMatches(q, cb) {
var lq = q.toLowerCase();
var matches = [];
$.each(strs, function(i, str) {
if (str.toLowerCase().indexOf(lq) != -1) matches.push(str);
});
cb(matches);
}

So regular expressions are "complicated", and easy to get wrong. "." for instance has special meaning in regex which matches any charachter except newline in JS, so for example based on Mozilla's docs RexExp(".n", "i") would match ".n", "an", "in", "?n" and many more.
Regular expressions are difficult to get right.
#John-Hascall's suggestion is a good fix for the problem.

open typeahead drop down by clicking down key first and then traverse the drop down

I am using bootstrap typeahead in my angular project. My requirement was to open the typeahead drop down by pressing down key when user have not entered any text. I have successfully added this functionality by using this link. Here is my demo.
Now down key opens the drop down and hence it lose the default behavior of traversing the drop down (moving down to next option).
index.html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet" />
<link href="style.css" rel="stylesheet" />
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.2/angular.js"></script>
<script src="ui-bootstrap-tpls-0.10.0.js"></script>
<script src="script.js"></script>
</head>
<body>
<div class="container-fluid" ng-controller="TypeaheadCtrl">
<input type="text" ng-keydown="show($event)" ng-trim="false" ng-model="selected" empty-typeahead typeahead="state for state in states | filter:$viewValue:stateComparator" class="form-control" />
<pre ng-show="opened">Model: {{selected | json}}</pre>
</div>
</body>
</html>
script.js
(function () {
var secretEmptyKey = '[$empty$]'
angular.module('plunker', ['ui.bootstrap'])
.directive('emptyTypeahead', function () {
return {
require: 'ngModel',
link: function (scope, element, attrs, modelCtrl) {
// this parser run before typeahead's parser
modelCtrl.$parsers.unshift(function (inputValue) {
var value = (inputValue ? inputValue : secretEmptyKey); // replace empty string with secretEmptyKey to bypass typeahead-min-length check
modelCtrl.$viewValue = value; // this $viewValue must match the inputValue pass to typehead directive
return value;
});
// this parser run after typeahead's parser
modelCtrl.$parsers.push(function (inputValue) {
return inputValue === secretEmptyKey ? '' : inputValue; // set the secretEmptyKey back to empty string
});
}
}
})
.controller('TypeaheadCtrl', function($scope, $http, $timeout) {
$scope.selected = undefined;
$scope.states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Dakota', 'North Carolina', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'];
$scope.stateComparator = function (state, viewValue) {
return viewValue === secretEmptyKey || (''+state).toLowerCase().indexOf((''+viewValue).toLowerCase()) > -1;
};
$scope.show = function (e) {
var keyCode = e.keyCode || e.which;
if (keyCode == 40) { //If it's the down key
$timeout(function () {
$(e.target).triggerHandler('input');
});
}
};
});
}());
Is there any way to open the drop down when clicking first time and then move to next option if clicked again?

Finally, I fix the issue by putting an if condition when opening typeahead drop down.
$scope.show = function (e) {
if($scope.selected === undefined){
var keyCode = e.keyCode || e.which;
if (keyCode == 40) { //If it's the down key
$timeout(function () {
$(e.target).triggerHandler('input');
});
}
}
};
and giving undefined in $scope.selected if user have not selected any item:
$scope.clearIfEmpty = function () {
if($scope.selected !== undefined && $scope.selected.length === 0){
$scope.selected = undefined;
}
}
Fix in action

Angularjs typehead directive

I am trying to create an reusable typehead directive in AngularJS but I've hit a few bumps on the road. Here is my working example:
Directives.js
app.directive('autosuggest', function() {
return {
restrict: 'A',
link: function (scope, elem, attrs) {
/* Nothing here yet */
}
};
});
app.directive('suggestinput', function() {
return {
restrict: 'A',
link: function (scope, elem, attrs) {
// Bind keys
elem.bind('keydown', function (e) {
if (e.keyCode == 38 || e.keyCode == 40 || e.keyCode == 13) { scope.$emit('listNavigate', { code: e.keyCode }); }
else {
// Get suggestions
scope.getSuggest(attrs.source, elem.val());
}
});
// Listen for suggestion list
scope.$on('listSelect', function (e, data) {
elem.val(data.name);
});
}
};
});
app.directive('suggestlist', function() {
var selectedIndex = -1;
return {
restrict: 'A',
link: function (scope, elem, attrs) {
scope.$on('listNavigate', function (e, data) {
if (data.code === 38) {
selectedIndex--;
// User pressed up arrow
elem.children().removeClass('sel');
elem.children().eq(selectedIndex).addClass('sel');
} else if(data.code == 40) {
selectedIndex++;
// User pressed down arrow
elem.children().removeClass('sel');
elem.children().eq(selectedIndex).addClass('sel');
} else if(data.code == 13) {
// Prepare data
var selectData = {};
selectData.suggestValue = elem.children().eq(selectedIndex).children().html();
selectData.suggestId = elem.children().eq(selectedIndex).children().attr('item-id');
// Send data to input(s)
scope.$emit('listSelect', selectData);
}
});
}
};
});
Html:
<fieldset autosuggest>
<input type="hidden" name="languageId">
<input type="text" suggestinput source="languages">
<input type="submit" class="button" value="Save">
<ul suggestlist ng-show="suggest.languages" class="suggestList">
<li ng-repeat="language in suggest.languages">
</li>
</ul>
</fieldset>
I have two questions:
How do I pass the item-id from the suggestion list to the hidden input?
How to make it a reusable component? (make it work even if I have multiple typeheads on the same page)
Thanks!

Have you taken a look # Angular ui's directive for twitter bootstrap typehead. This'll save you a lot of hassle ui.bootstrap.typeahead
HTML
<div ng-app="app" id="app">
<div class='container-fluid' ng-controller="TypeaheadCtrl">
<pre>Model: {{selected| json}}</pre>
<input type="text" ng-model="selected" typeahead="state for state in states | filter:$viewValue | limitTo:8"/>
</div>
</div>
JS/Controller
var app = angular.module('app', ['ui.bootstrap']);
function TypeaheadCtrl($scope) {
$scope.selected = undefined;
$scope.states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California', 'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii', 'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana', 'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota', 'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire', 'New Jersey', 'New Mexico', 'New York', 'North Dakota', 'North Carolina', 'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island', 'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont', 'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'];
}
JSFIDDLE

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