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- javascript - When should I use ?? (nullish coalescing) vs || (logical . . .
Related to Is there a "null coalescing" operator in JavaScript? - JavaScript now has a ?? operator which I see in use more frequently Previously most JavaScript code used || let userAge =
- What does this symbol mean in JavaScript? - Stack Overflow
What is this? This is a collection of questions that come up every now and then about syntax in JavaScript This is also a Community Wiki, so everyone is invited to participate in maintaining this
- What does javascript:void (0) mean? - Stack Overflow
Usage of javascript:void(0) means that the author of the HTML is misusing the anchor element in place of the button element Anchor tags are often abused with the onclick event to create pseudo-buttons by setting href to "#" or "javascript:void (0)" to prevent the page from refreshing
- JavaScript OR (||) variable assignment explanation - Stack Overflow
That is, JavaScript "short-circuits" the evaluation of Boolean operators and will return the value associated with either the first non-false variable value or whatever the last variable contains See Anurag's explanation of those values that will evaluate to false Using this technique is not good practice for several reasons; however
- Which equals operator (== vs ===) should be used in JavaScript . . .
I'm using JSLint to go through JavaScript, and it's returning many suggestions to replace == (two equals signs) with === (three equals signs) when doing things like comparing idSele_UNVEHtype value
- Newest javascript Questions - Stack Overflow
JavaScript (a dialect of ECMAScript) is a high-level, multi-paradigm, object-oriented, prototype-based, dynamically-typed, and interpreted language traditionally used for client-side scripting in web browsers
- What does the !! (double exclamation mark) operator do in JavaScript . . .
Novice JavaScript developers need to know that the "not not" operator is using implicitly the original loose comparison method instead of the exact or operators and also the hidden cast operation that is happening behind the scenes and I show it in the example I provide
- How to remove all event listeners of a DOM object in JavaScript?
In this case we just need to right click on the input field, select "Inspect element" in a browser like Firefox and remove the HTML attribute However, if the event was added through JavaScript like this:
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