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JS - Expected a conditional expression and instead saw an assignment [closed]

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Closed 10 months ago.
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The piece of code below seems to work in online code editors but when using on Cloud9 IDE, it comes up with that error message. Is there a way to sort this or alternatively write this bit of code?
The error appears on line 3, the for loop statement.
var text1 = document.querySelector('input[name="contract-type"]').value;
var select1 = document.getElementById('contract-type-list');
for(var i, j=0; i = select1.options[j]; j++){
if(i.text == text1){
select1.selectedIndex = j;
break;
}
}

The linter is warning you that i = select1.options[j] is a strange expression to be checking for truthyness, because it's an assignment. While you could ignore the rule, a better approach would be to iterate through the option children from querySelectorAll or .children or with the collection's iterator instead of going through .options[index].
var text1 = document.querySelector('input[name="contract-type"]').value;
var select1 = document.getElementById('contract-type-list');
for (const [i, option] of [...select1.options].entries()) {
if (option.text == text1) {
select1.selectedIndex = i;
break;
}
}
Or, if the value is definitely one of the options, just do
document.getElementById('contract-type-list').value = document.querySelector('input[name="contract-type"]').value;
or, if it might not exist:
const inputText = document.querySelector('input[name="contract-type"]').value;
const select = document.getElementById('contract-type-list');
const matchingOption = [...select.children].find(option => option.text === inputText);
if (matchingOption) {
select.value = matchingOption.ariaValueMax;
}

I am trying to concatenate the second parameter to the first in JS [closed]

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Closed 11 months ago.
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I'm pretty stuck, It should evaluate to ["present", "pretty", "precede"]
function addTooStart(x, y) {
let a = [];
let b = "";
for (let i in x) {
a = x.push(y);
a = x[b]
}
return a
}
let abc = addTooStart(["sent", "tty", "cede"], "pre");
console.log(abc)

I'm not sure what your a and b are attempting to do here. Some problems from your code:
x.push(y) adds the element y to the end of the array x, and then returns the new length of the array, so now a is a number.
x[b] will always be an invalid call, since b equals the empty string and is never changed, arrays are integer indexed.
The general approach here would be to loop through the array x, like you did, then for each element, set it equal to "y + current element". I have attached a working version below.
function addToStart(x,y){
for (let i = 0; i < x.length; i++) {
x[i] = y + x[i]
}
return x
}
addToStart([ "sent", "tty", "cede" ], "pre"); // -> [ 'present', 'pretty', 'precede' ]

Filter a table by Javascript [closed]

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Closed 7 years ago.
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<script type="text/javascript">
function filterResults() {
var trTag = document.getElementsByTagName("tr");
for (var i = 0; i < trTag.length; i++) {
if (trTag[i].OuterHTML.includes(filterTXT.Value)) {
trTag.Style.Display = "none";
}
}
}
</script>
Firefox tells me: trTag[i].OuterHTML is undefined. I assume this is because OuterHTML does not exist? If so, what do I use instead?

JavaScript is a case-sensitive language.
JavaScript is case sensitive. It is common to start the name of a constructor with a capitalised letter, and the name of a function or variable with a lower-case letter (ref).
You might want to make these changes
outerHTML not OuterHTML (ref)
style not Style (ref)
display not Display (ref)
value not Value (ref)
in your script.
<script type="text/javascript">
function filterResults() {
var trTag = document.getElementsByTagName("tr");
for (var i = 0; i < trTag.length; i++) {
if (trTag[i].outerHTML.includes(filterTXT.value)) {
trTag.style.display = "none";
}
}
}
</script>

Missing ) after arguement list. (line 6 file "code") [closed]

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Closed 8 years ago.
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I'm new to coding and a got this pre set code to use within a spreadsheet for a google awesome table, and I keep getting this error.
Missing ) after argument list. (line 6, file "Code)
Here is my code:
var formURL = 'https://docs.google.com/a/waitrose.co.uk/forms/d/11-z44oW1ixP1tShkwjrBpa0DptOA2IinU5MCCkUvf0o/viewform';
var sheetName = 'Form responses 1';
var columnIndex = 5;
function getEditResponseUrls(){
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(Form responses 1);
var data = sheet.getDataRange().getValues();
var form = FormApp.openByUrl(formURL);
for(var i = 2; i < data.length; i++) {
if(data[i][0] != '' && (data[i][columnIndex-1] == '' || !data[i][columnIndex-1])) {
var timestamp = data[i][0];
var formSubmitted = form.getResponses(timestamp);
if(formSubmitted.length < 1) continue;
var editResponseUrl = formSubmitted[0].getEditResponseUrl();
sheet.getRange(i+1, columnIndex).setValue('<div style="width:100px">Edit entry</div>');
}
}
}

Looks like you are missing a pair of quotes on line 6:
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(Form responses 1);
should be
var sheet = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Form responses 1");

Javascript - Passing from a DOM element to array [closed]

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Closed 8 years ago.
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Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
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Hello and thank you for your time.
Here is the code :
<script>
var names = document.getElementsByClassName('xx');
var ar = [];
for (var i = 0, c = names.length ; i < c ; i++) {
ar[i] = names[i].innerHTML;
alert(ar[i]);// the results are : undefined
}
</script>`
I've tried to use the method tostring, or to push the results into the array but without success.
Thanks

Your main issue seems to be fixed. Make sure the DOM has been loaded before you try to run your code, and there is no need for two variables in your loop. Simplify it like below:
window.onload = function () {
var names = document.getElementsByClassName('xx');
var ar = [];
for (var i = 0 ; i < names.length ; i++) {
ar[i] = names[i].innerHTML;
alert(ar[i]);
}
};
Fiddle

ar.length equals 0, because you just declare the array, but dont put anything into it. I think what you wanted to do is the following:
var names = document.getElementsByClassName('xx');
var ar = [];
for (var i = 0 ; i < names.length ; i++) {
ar[i] = names[i].innerHTML;
alert(ar[i]);
}