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When should I use double or single quotes in JavaScript?
...ichever best suits the string.
Using the other type of quote as a literal:
alert('Say "Hello"');
alert("Say 'Hello'");
This can get complicated:
alert("It's \"game\" time.");
alert('It\'s "game" time.');
Another option, new in ECMAScript 6, is template literals which use the backtick character:
a...
What's the difference between event.stopPropagation and event.preventDefault?
..."#foo").click(function () {
alert("parent click event fired!")
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="foo">
<button id="but">button</button>
</div>
stopPropagation
$("#but").click(...
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Advantages of using prototype, vs defining methods straight in the constructor? [duplicate]
...fn is called before the function is assigned!
fn();
var fn = function () { alert("test!"); }
// Works as expected: the fn2 declaration is hoisted above the call
fn2();
function fn2() { alert("test!"); }
share
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...
innerText vs innerHTML vs label vs text vs textContent vs outerText
I have a dropdown list which is populated by Javascript.
6 Answers
6
...
Can we call the function written in one JavaScript in another JS file?
... alertOne() {
alertNumber("one");
}
HTML
<head>
....
<script src="File1.js" type="text/javascript"></script>
<script src="File2.js" type="text/javascript"></script>
....
</head>
<body>
....
<script type="text/javascript">
a...
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How to Handle Button Click Events in jQuery?
...ick', '#btnClick', function(){
alert("button is clicked");
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="btnClick">Click me</button>
...
When should I use jQuery's document.ready function?
I was told to use document.ready when I first started to use Javascript/jQuery but I never really learned why.
8 Answers
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What is the difference between typeof and instanceof and when should one be used vs. the other?
...
A good reason to use typeof is if the variable may be undefined.
alert(typeof undefinedVariable); // alerts the string "undefined"
alert(undefinedVariable instanceof Object); // throws an exception
A good reason to use instanceof is if the variable may be null.
var myNullVar = null;
ale...