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In javascript, is an empty string always false as a boolean?
in javascript,
5 Answers
5
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How to display a confirmation dialog when clicking an link?
I want this link to have a JavaScript dialog that asks the user “ Are you sure? Y/N ”.
9 Answers
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JavaScript - onClick to get the ID of the clicked button
...k="reply_click(this.id)">B3</button>
<script type="text/javascript">
function reply_click(clicked_id)
{
alert(clicked_id);
}
</script>
This will send the ID this.id as clicked_id which you can use in your function. See it in action here.
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Javascript checkbox onChange
...ely, the event is not triggered when the checkbox state is changed through JavaScript.
– StanE
Jun 23 '15 at 22:30
2
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How to grab substring before a specified character jQuery or JavaScript
... am trying to extract everything before the ',' comma. How do I do this in JavaScript or jQuery? I tried this and not working..
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Accessing the web page's HTTP Headers in JavaScript
How do I access a page's HTTP response headers via JavaScript?
17 Answers
17
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Pass a JavaScript function as parameter
...mething I will add to this is that this feature alone - being able to pass JavaScript functions as arguments or variables or the like - is the feature that makes JavaScript so powerful and so great to code in.
– TheHansinator
Dec 9 '15 at 22:16
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How can I match multiple occurrences with a regex in JavaScript similar to PHP's preg_match_all()?
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This is what I was hoping for. What I've never seen in JavaScript documentation is mention that the exec() method will continue to return the next result set if called more than once. Thanks again for the great tip!
– Adam Franco
Feb 6 '09 a...
JavaScript: Get image dimensions
...n image. I need to determine the height and width of this image using only JavaScript. The image cannot be visible to the user on the page. How can I get its dimensions?
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How can I declare optional function parameters in Javascript? [duplicate]
...iniGod's comment: null, undefined, 0, false, ''
It's pretty common to see JavaScript libraries to do a bunch of checks on optional inputs before the function actually starts.
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