I downloaded markdown from http://code.google.com/p/wmd/ (well, in fact I cloned the hg repository), in order to have a client-side highlighter for static text, i.e. I don't need the editor.
However, I tried to instantiate the converter, essentially like in the demo:
<script type="text/javascript">
(function () {
var conv = Markdown.getSanitizingConverter();
var ed = new Markdown.Editor(conv);
ed.run();
})();
</script>
However, if I run this, the JS error console tells me:
Error: text is undefined
Source File: http://bitmask.de/markdown_test/Markdown.Converter.js
Line: 149
Which I traced to the call of ed.run().
I put the whole minimal demo on http://bitmask.de/markdown_test/js.html
I didn't modify the js files or anything (basically because I have very very limited js knowledge), just did what the demo does. What's wrong here?
You can't use <div> element for the input, it has to be something editable (e.g. <textarea> or <input type="text">):
<div class="wmd-panel">
<div id="wmd-button-bar"></div>
<textarea id="wmd-input" class="wmd-input">`hello` *cruel* world</textarea>
</div>
Be also carefull about spaces in the HTML source. Your second sample has a line starting with more than four spaces, which means "code" in Markdown:
<!-- this will be formated as <pre> element -->
<textarea class="wmd-input" id="wmd-input">
`hello` *cruel* world
</textarea>
Most likely, to get this to work, you have to assign the wmd-panel css class to the HTML element that you want the WMD Markdown to act on.
The Google Code demo looks like this:
HTML:
<html>
<head>
<title>PageDown Demo Page</title>
<link rel="stylesheet" type="text/css" href="demo.css" />
<script type="text/javascript" src="../../Markdown.Converter.js"></script>
<script type="text/javascript" src="../../Markdown.Sanitizer.js"></script>
<script type="text/javascript" src="../../Markdown.Editor.js"></script>
</head>
<body>
<div class="wmd-panel">
<div id="wmd-button-bar"></div>
<textarea class="wmd-input" id="wmd-input"> This is the *first* editor.
------------------------------
Just plain **Markdown**, except that the input is sanitized:
<marquee>I'm the ghost from the past!</marquee> </textarea>
</div>
<div id="wmd-preview" class="wmd-panel wmd-preview"></div>
<br /> <br />
<div class="wmd-panel">
<div id="wmd-button-bar-second"></div>
<textarea class="wmd-input" id="wmd-input-second"> This is the *second* editor.
------------------------------
It has a plugin hook registered that surrounds all words starting with the letter A with asterisks before doing the Markdown conversion. Another one gives bare links a nicer link text. User input isn't sanitized here:
<marquee>I'm the ghost from the past!</marquee>
http://google.com
http://stackoverflow.com
It also includes a help button. </textarea>
</div>
<div id="wmd-preview-second" class="wmd-panel wmd-preview"></div>
Javascript:
<script type="text/javascript">
(function () {
var converter1 = Markdown.getSanitizingConverter();
var editor1 = new Markdown.Editor(converter1);
editor1.run();
var converter2 = new Markdown.Converter();
converter2.hooks.chain("preConversion", function (text) {
return text.replace(/\b(a\w*)/gi, "*$1*");
});
converter2.hooks.chain("plainLinkText", function (url) {
return "This is a link to " + url.replace(/^https?:\/\//, "");
});
var help = function () { alert("Do you need help?"); }
var editor2 = new Markdown.Editor(converter2, "-second", { handler: help });
editor2.run();
})();
</script>
Notice the use of class="wmd-panel" to mark those areas that the WMD Markdown is to act on?
Related
I'm fairly new to javascript, and getting quite frustrated by the following code
<!DOCTYPE html>
<html>
<script>
var time = '0'
var area = 'neast'
function update_area(input) {
area = input;
load_updated_image(area,time);
};
function update_time(input) {
time = input;
load_updated_image(area,time);
};
function load_updated_image(area,time) {
var url = 'http://personal.psu.edu/kps5442/modelimages/hrrr_'+area+'_wetbulb'+time+'.png';
document.getElementById("theImage").src = url;
document.getElementById("url").innerHTML = url;
};
</script>
<body onload="load_updated_image(area,time)">
<p>URL Output:</p>
<p id="url"></p>
<font size = 4><b>Forecast Hour: </b>
<font size = 3>
<a href="#" onmouseover="update_time(0);" /> 00</a>
<a href="#" onmouseover="update_time(1);" /> 01</a>
<a href="#" onmouseover="update_time(2);" /> 02</a>
<img id="theImage" src=undefined width="850" height="600" />
<br> <font size = 4><b>Region Selection: </b>
<a href="#" onclick="update_area(neast);" /> Northeast</a>
<a href="#" onclick="update_area(seast);" /> Southeast</a>
</body>
</html>
I have 18 different "hours" of images for different regions across the US. The goal is to change the hour of the image when the hour links are moused over, and update the region when the region links are clicked.
The function update_time() works as expected, changing the image as I mouse over the links. However, the function update_area() fails with the following error:
"Uncaught ReferenceError: neast is not defined"
I'm not sure why this is happening, because the update_time and update_area functions are built in exactly the same way, and I globally defined the time and area variables at the start of the script.
Any help would be appreciated!
You have to put the arguments in quotes .
onclick="update_area('neast');"
onclick="update_area('seast');"
<!DOCTYPE html>
<html>
<script>
var time = '0'
var area = 'neast'
function update_area(input) {
area = input;
load_updated_image(area,time);
};
function update_time(input) {
time = input;
load_updated_image(area,time);
};
function load_updated_image(area,time) {
var url = 'http://personal.psu.edu/kps5442/modelimages/hrrr_'+area+'_wetbulb'+time+'.png';
document.getElementById("theImage").src = url;
document.getElementById("url").innerHTML = url;
};
</script>
<body onload="load_updated_image(area,time)">
<p>URL Output:</p>
<p id="url"></p>
<font size = 4><b>Forecast Hour: </b>
<font size = 3>
<a href="#" onmouseover="update_time(0);" /> 00</a>
<a href="#" onmouseover="update_time(1);" /> 01</a>
<a href="#" onmouseover="update_time(2);" /> 02</a>
<img id="theImage" src=undefined width="850" height="600" />
<br> <font size = 4><b>Region Selection: </b>
<a href="#" onclick="update_area('neast');" /> Northeast</a>
<a href="#" onclick="update_area('seast');" /> Southeast</a>
</body>
</html>
In JavaScript variables are not restricted to a single 'type', but a String will always be contained in quotes and a number will not. Also a variable cannot be, or start with, a number. This is why when you use a string as an argument it must be contained within quotes, otherwise it thinks you are sending a variable.
You're starting your document with <!doctype html> so you're saying you're writing HTML5, but there is a whole bunch of things that are incredibly wrong here due to use HTML3.2 and obsolete ways to invoke javascript.
Under modern HTML5 rules, there are no self-closing elements. It's not a hard error, but don't add that /> at the end of an <img.... Also <font> hasn't existed as element for 20 years now. It was removed in HTML4.1 in 1998. Then some semantics: if you need button functionality (i.e. clickable, but NOT navigating to some (part of a) page), use <button>. That's what it's for. Do not use <a>, and definitely not with href="#", because that's an active instruction for the browser to scroll to the top of the page. Finally, on...=... handlers are an ancient attribute that is unfortunately still supported, but you should never use. Use addEventListener in your Javascript, after you've declared all your HTML.
So let's just fix everything at the same time:
<!-- this line literally tells the browser "I am using HTML5" -->
<!DOCTYPE html>
<html>
<!-- always have a header section -->
<head>
<!-- no / at the end of meta elements -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Always just fill this in, it's good practice</title>
<style>
/* you want this in its own file, see the note at the end of this post */
h1 {
font-size: 100%;
font-weight: bold;
}
</style>
</head>
<body>
<!-- sectioning isn't mandatory, but extremely good practice -->
<section id="output">
<h1>URL Output:</h1>
<p>Forecast Hour:</p>
<div class="controls">
<!-- let's use data attributes, and be explicit about the values here -->
<button class="forecast update" data-value="0">0h</button>
<button class="forecast update" data-value="1">1h</button>
<button class="forecast update" data-value="2">2h</button>
</p>
<!-- if you've never see the figure/figcaption elements: they exist -->
<figure id="forecast-image">
<!-- no / at the end of this element -->
<img src="placeholder.jpg" width="850" height="600" alt="forecast map">
<figcaption></figcaption>
</figure>
</section>
<section>
<h1>Region Selection</h1>
<div class="controls">
<button class="area update" data-value="neast">Northeast</buton>
<button class="area update" data-value="seast">Southeast<button>
</div>
</section>
<!-- don't put your script in the page. put it in its own file -->
<script src="updates.js"></script>
</body>
</html>
And then we make a second file for the javascript called updates.js:
// this goes last, so that the DOM is done by the time you invoke your script.
var currentTime = 0;
var currentArea = `NorthEast`;
// this function doesn't need parameters: we already know what they are
function load_updated_image() {
var url = `http://personal.psu.edu/kps5442/modelimages/hrrr_${currentArea}_wetbulb${currentTime}.png`;
let figure = document.getElementById(`forecast-image`);
// update the image
let img = figure.querySelector(`img`);
img.src = url;
// update the image caption with a link
let caption = figure.querySelector(`figcaption`);
caption.innerHTML = ``;
let link = document.createElement(`a`);
link.href = url;
caption.appendChild(link);
}
// update the area, and called image update
function update_area(area) {
currentArea = area;
load_updated_image();
};
// update the time, and called image update
function update_time(time) {
currentTime = timel
load_updated_image();
};
// add the initial page load handling
document.addEventListener(`ready`, evt => load_updated_image());
// add the click handling for forecast time buttons
let forecastButtons = document.querySelectorAll(`button.forecastupdate`);
forecastButtons.forEach(button => {
// get the button's data-value
value = button.dataset.value;
// and then set up a click listener to update the forecast time
button.addEventListener(`click`, evt => update_time(value));
});
// add the click handling for forecast area buttons
let areaButtons = document.querySelectorAll(`button.area.update`);
forecastButtons.forEach(button => {
// get the button's data-value
value = button.dataset.value;
// and then set up a click listener to update the forecast area
button.addEventListener(`click`, evt => update_area(value));
});
And then to be even more proper, don't use <style>...</style> but make a new file called "forecast.css" and then link to that in your page using <link href="forecast.css" rel="stylresheet"> (note: this is still HTML5, you don't put /> at the end. Link elements simply don't have a closing tag)
this is actually a follow up question to this question
that was solved thanks to Rory McCrossan.
I now have this functioning script; a search function that shows a div depending on a searchword.
JS
$('#search').click(function() {
var txt = $('#search-criteria').val();
if (txt)
$('.fruit').hide().filter('#' + txt.toLowerCase()).show();
});
CSS
.fruit {
display: none;
}
HTML
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script
<input type="text" id="search-criteria" />
<input type="button" id="search" value="search" />
<div class="fruit" id="apple">
<h3>Some text about apples</h3>
</div>
<div class="fruit" id="orange">
<h3>Some text about oranges</h3>
</div>
What I now wonder is if someone could help me with some kind of error handling to add to this script, preferably that can be smoothly added without rewriting the logic of the script. I.e. I'd like to display another div with a message when the search comes up with no result and/or when the user makes an empty string search.
Since I'm actually an UX designer my technical skills are somewhat limited and I'm therefore very grateful if someone could help me with this...
Thanks in advance!
simple javascipt error handing using try and catch:--
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
function adddlert2($a){
alert($a);
}
try {
adddlert("Welcome guest!");
}
catch(err) {
document.getElementById("demo").innerHTML = err.message;
}
</script>
</body>
</html>
You can use try and catch in this case, but If you want to be informed about all irregularities in your application I prefer to use dedicated services for this job.
I use Sentry.io, this is nice service to handle exceptions and errors in backend and frontend. Is simple to use, you only need to add one additional JS script without modifying existing code. More about installation process here
I guess what you're looking for is this :) I know changing to .keyup() had nothing to do with your question, so change it back if you like
<input type="text" id="search-criteria" />
<input type="button" id="search" value="search" />
<div id="default" class="fruit">
no fruit found
</div>
<div class="fruit" id="apple">
<h3>Some text about apples</h3>
</div>
<div class="fruit" id="orange">
<h3>Some text about oranges</h3>
</div>
and
<script>
$(document).ready(function(){
$('#search-criteria').keyup(function() {
var txt = $('#search-criteria').val();
if (txt){
var elements = $('.fruit').hide().filter('#' + txt.toLowerCase());
if(elements.length > 0){
elements.show();
}
else{
$("#default").html("No result found for "+txt);
$("#default").show();
setTimeout(function(){
$("#default").hide();
}, 1000);
}
}
});
});
</script>
Another error handing(javascript example) using javascript SEARCH function:--
<!DOCTYPE html>
<html>
<body>
<p id="demo"></p>
<script>
try {
var str_wrong = "Visit";
var n = str.search("Visit");
document.getElementById("demo").innerHTML = n;
}
catch(err) {
document.getElementById("demo").innerHTML = err.message;
}
</script>
</body>
</html>
I'm really confused on how to go about this.
What I'm trying to do is, have a form in HTML (not <form>), just a bunch of <input> tags with a <button>.
Basically, in the javascript code, there's an event listener that activates the MakeCard() method, when the <button> is pressed.
The MakeCard() method is supposed to then replace the form (in the HTML body) with a <div> that has it's own random stuff.
How do I make this system work? Please no JQuery and other such libraries. I'm only allowed to use DOM.
This is the code I have so far:
<html>
<head>
<title>Home</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link type="text/css" rel="stylesheet" href="css/style.css"/>
<script>
window.addEventListener("load", function(){
var nameOfRecipient = document.getElementById("nameOfRecipient");
var colorInfo = document.getElementById("colorInformation");
var fontSize = document.getElementById("fontSize");
var resultNameOfRecipient = document.getElementById("resultNameOfRecipient");
var resultColorInfo = document.getElementById("resultColorInformation");
var resultFontSize = document.getElementById("resultFontSize");
function MakeCard(){
// Make the card
// Show the results
ShowResults();
}
function ShowResults(){
// Show the user choices
resultNameOfRecipient.innerHTML = nameOfRecipient.value;
resultColorInfo.innerHTML = colorInfo.value;
resultFontSize.innerHTML = fontSize.value;
}
document.getElementById("submitButton").addEventListener("click", MakeCard);
});
</script>
</head>
<body>
<div id="headerContainer">
Welcome to the Card Maker!
</div>
<div id="formContainer">
<p>Name of recipient<input type="text" id="nameOfRecipient"></p>
<p>Color Information<input type="text" id="colorInformation"></p>
<p>Font Size<input type="number" id="fontSize"></p>
<input type="button" id="submitButton" value="Make Card!">
</div>
<div id="resultContainer">
<p id="resultNameOfRecipient"></p>
<p id="resultColorInformation"></p>
<p id="resultFontSize"></p>
</div>
</body>
PLEASE IGNORE THE LAST DIV WITH ID="resultContainer" and ignore all the variables that have the result in front. That stuff is other extra stuff.
It would be amazing if I could just know how to make an entirely new div that REPLACES the div with ID="formContainer".
First things first: Why use listeners when you can use onclick tags? Set the button like this, and change the listener to a dedicated function:
window.addEventListener("load", function(){
becomes
function myfunction() {
and don't forget to change the end of the script from }); to }..
Also, remove the listener from the button, which is this line.
document.getElementById("submitButton").addEventListener("click", MakeCard);
And add an onclick event to the button, and change it to a button type, to make sure it doesn't submit:
<button type="button" id="submitButton" onclick="myfunction()">Make Card!</button>
Secondly: You've set variables to actual HTML elements, which would show something like: HTML[buttonElement]... I'm assuming what you want is what was typed in the element, which is the "value" tag. You would get that by changing the variables to this:
var nameOfRecipient = document.getElementById("nameOfRecipient").value;
var colorInfo = document.getElementById("colorInformation").value;
var fontSize = document.getElementById("fontSize").value;
var resultNameOfRecipient = document.getElementById("resultNameOfRecipient").value;
var resultColorInfo = document.getElementById("resultColorInformation").value;
var resultFontSize = document.getElementById("resultFontSize").value;
So now that we've tidy'd up your syntax and stuff, I wanna get on to the part where you said you wanted to replace the DIV. Here's my way of doing it:
I would give every element in the DIV an ID (other than the button, we've already discussed that).
<p id="nameofrecipentp">Name of recipient<input type="text" id="nameOfRecipient"></p>
<p id="colorinformationp">Color Information<input type="text" id="colorInformation"></p>
<p id="fontsizep">Font Size<input type="number" id="fontSize"></p>
You could then call a function when the function myfunction() is called.
function myfunction() {
replacediv()
And define replacediv() to replace all the elements in the form to whatever you'd like.
function replacediv() {
document.getElementById("nameofrecipentp").innerHTML =
"Enter your data here"
document.getElementById("colorinformationp").innerHTML =
"Enter your data here, for the color information"
document.getElementById("fontsizep").innerHTML =
"enter your data here for font size"
}
I think I pretty much covered everything. If you still need help, tell me.
I am trying to search for a word inside a pdf using a textbox inside the webpage.I embedded the pdf inside a IFRAME, but it is not working.This code is working with normal text.When i search for words, sometimes it opens the pdf or refreshes the page, instead of highlighting it.
<style>
span.highlight {
background: yellow
}
</style>
<input type="text" />
<div class="para">
<button onclick="getIframeText()">get iframe text</button>
<iframe id="myframe1" src="h.pdf" style="width:718px; height:700px;" frameborder="0"></iframe>
</div>
JAVASCRIPT FOR SEACRHING THE TEXT
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type='text/javascript'>
var $para = $('.para')
$("input").keyup(function() {
$para.find('span.highlight').contents().unwrap();
var mysearchword = this.value.trim();
if (mysearchword) {
var re = new RegExp('(' + mysearchword.trim().split(/\s+/).join('|') + ')', "gi");
$para.html(function(i, html) {
return html.replace(re, '<span class="highlight">$1</span>')
});
}
});
</script>
The code will not work for PDF.
Replacing the word found in HTML with highlight class, it's okay. But this is not possible for PDF. You need to convert PDF into HTML first.
Is it possible to add a textbox into an iframe, and append it into the src of the iframe. So i have created an modal box displaying a button for the user to click "ADD BUTTON"
<div id="addFeature" class="openAdd">
<div>
X
<h2>Add...</h2>
<button class="text" type="button">Text</button>
</div>
</div>
As the user clicks on the button, I need the modal box to close and a text box added. The following iframe is within main.html. As you can see the iframe displays the other html page.
<div>
<iframe class="newIframe" id="newIframe" src="webpage.html" onload="iFrameOn();">
Your browser does not support Iframes
</iframe>
</div>
Though I need the textbox to be added in webpage.html which is
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript" src="index.js"></script>
</head>
<body onload="iFrameOn();">
<div id="design">
</div>
</body>
</html>
JS:
addTextBox() {
var text = "'<div><input type='textbox'/></div>'"
var textbox = document.createElement('div');
textbox.innerHTML = text;
var addText = document.getElementById('div').src = "webpage.html";
addText.appendChild(textbox);
}
Is it possible to do what I'm asking?
I'm afraid explaining this in the way you're trying to do this now, would be an endless swamp. Here's some guidelines, how you can achieve this quite easy.
Probably you need to remove the onload from iframe tag first. Then put these lines to your main page:
var textForIframe; // Take care that this variable is declared in the global scope
function addText () {
document.getElementById('newIframe').src = 'webpage.html';
textForIframe = '<div><input type="text" /></div>'; // or whatever text you need
return;
}
When ever your dialog is ready, call addText().
Then in webpage.html, remove the onload from body tag, and add the function below to somewhere after <script src="index.js"></script> tag.
window.onload = function () {
var addTextElement = document.getElementById('design'), // or whatever element you want to use in iframe
textToAdd = parent.textForIframe;
// depending on what iFrameOn() does, place it here...
addTextElement.innerHTML = textToAdd;
iFrameOn(); // ... or it can be placed here as well
return;
};
These snippets add a new input type="text" to #design within iframe.