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How do I correctly clone a JavaScript object?
... do not modify x . I realized that copying objects derived from built-in JavaScript objects will result in extra, unwanted properties. This isn't a problem, since I'm copying one of my own literal-constructed objects.
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Set CSS property in Javascript?
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That's actually quite simple with vanilla JavaScript:
menu.style.width = "100px";
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How do you performance test JavaScript code?
...er. Sometimes the difference is HUGE and worth knowing.
You could just use javascript timers. But I typically get much more consistent results using the native Chrome (now also in Firefox and Safari) devTool methods console.time() & console.timeEnd()
Example of how I use it:
var iterations = 100...
Number of elements in a javascript object
Is there a way to get (from somewhere) the number of elements in a javascript object?? (i.e. constant-time complexity).
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How do I print debug messages in the Google Chrome JavaScript Console?
How do I print debug messages in the Google Chrome JavaScript Console?
14 Answers
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How to get the previous URL in JavaScript?
Is there any way to get the previous URL in JavaScript? Something like this:
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How do I loop through or enumerate a JavaScript object?
I have a JavaScript object like the following:
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How can I set multiple CSS styles in JavaScript?
I have the following JavaScript variables:
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What are the best practices to follow when declaring an array in Javascript?
... jAndy, why would you want an array with "10 empty slots" in JavaScript? In reality, you can do the exact same thing with: var arr = []; arr[9] = "omega"; 1. Arrays in JS are totally dynamic, you can reference any index you would like, and it will just be "undefined". This is ...
How to get text box value in JavaScript
I am trying to use JavaScript to get the value from an HTML text box but value is not coming after white space
15 Answers
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