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7 kwi 2014 · There's an example regex to restrict the upload to images only: var acceptFileTypes = /^image\/(gif|jpe?g|png)$/i; How can I change this to upload image files, and documents like PDF, TXT, DOC?
23 maj 2017 · var patt =/^[a-z0-9_()\-\[\]]+\.pdf$/i; var fileName = "my_test.pdf"; if (fileName.search(patt) < 0) {. // filename doesn't match the Regex. } else {. // filename matches the Regex. } Generally the JS regex has two parts in this case, /regex/i where regex is the regex (doh), and i is a switch meaning "ignore-case".
29 paź 2013 · One of the most common uses of regular expressions in JavaScript is testing a string for the existence of a pattern with the "test()" function. The "test()" function is a member of the RegExp Object and we use it like this:
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
5 lis 2022 · We can use the following regular expression:- const regExForPdf = /\w+\.pdf/g; files.filter( f => regExForPdf.exec(f) ); // Output. //['some-pdf-file1.pdf', 'some-pdf-file2.pdf'] Regular Expression explanation to find files with pdf extension. /\w+\.pdf/g. \w – \w will search for individual words. .pdf – will search for words ending with ‘pdf’.
25 lip 2024 · Uses a regular expression or a fixed string to break a string into an array of substrings. When you want to know whether a pattern is found in a string, use the test() or search() methods; for more information (but slower execution) use the exec() or match() methods.
25 lip 2024 · The test() method of RegExp instances executes a search with this regular expression for a match between a regular expression and a specified string. Returns true if there is a match; false otherwise.
