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Best way to alphanumeric check in JavaScript
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Check it with a regex.
Javascript regexen don't have POSIX character classes, so you have to write character ranges manually:
if (!input_string.match(/^[0-9a-z]+$/))
show_error_or_something()
Here ^ means beginning of string and $ means end of...
Run JavaScript code on window close or page refresh?
Is there a way to run a final JavaScript code when a user closes a browser window or refreshes the page?
8 Answers
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How to reset radiobuttons in jQuery so that none is checked
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@Noldorin "Truthy" and "falsy" are the terms many Javascript experts use, including Brendan Eich and Douglass Crockford. The key term is falsy since boolean evaluations are defined by the 6 falsy values. Truthy is the logical name for the opposite of falsy. I think the use o...
Best way to store a key=>value array in JavaScript?
What's the best way to store a key=>value array in javascript, and how can that be looped through?
7 Answers
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Capitalize words in string [duplicate]
...talize('fix this string'); // -> 'Fix This String'
* capitalize('javaSCrIPT'); // -> 'JavaSCrIPT'
* capitalize('javaSCrIPT', true); // -> 'Javascript'
*/
const capitalize = (str, lower = false) =>
(lower ? str.toLowerCase() : str).replace(/(?:^|\s|["'([{])+\S/g, ...
How to get the value from the GET parameters?
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JavaScript itself has nothing built in for handling query string parameters.
Code running in a (modern) browser you can use the URL object (which is part of the APIs provided by browsers to JS):
var url_string = "http:...
how to access iFrame parent page using jquery?
...page using jquery
window.parent.document.
jQuery is a library on top of JavaScript, not a complete replacement for it. You don't have to replace every last JavaScript expression with something involving $.
share
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Remove multiple elements from array in Javascript/jQuery
I have two arrays. The first array contains some values while the second array contains indices of the values which should be removed from the first array. For example:
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JQuery string contains check [duplicate]
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You can use javascript's indexOf function.
var str1 = "ABCDEFGHIJKLMNOP";
var str2 = "DEFG";
if(str1.indexOf(str2) != -1){
console.log(str2 + " found");
}
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How to convert string into float in JavaScript?
I am trying to parse two values from a datagrid. The fields are numeric, and when they have a comma (ex. 554,20), I can't get the numbers after the comma. I've tried parseInt and parseFloat . How can I do this?
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