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How to Check File MIME Type With JavaScript Before Upload

Often it is advisable to check file MIME type before upload. Here are the steps to check file MIME type with JavaScript before upload.

Sometimes you may need to replace line breaks with
in JavaScript. Here is how to do it.

Often you may need to detect when users your website or application. Here is how to detect when user leaves page.

You may need to allow your websites and applications to export HTML as PDF. Here is how to generate PDF from HTML using JavaScript.

Sometimes you may need to auto resize Iframe based on content. Here is how to do this using JavaScript.

Sometimes you may need to count substring occurrence in string in JS. Here is how to do this.

Sometimes you may need to convert comma separated string into JS array. Here are the steps to do it.

Sometimes you may need to suppress warning messages in MySQL. Here are the steps to do it.

Often you may need to show JavaScript date in 12 hour AM/PM format. Here is how to do this.

Sometimes you may need to get an HTML element’s actual width and height. Here is how to do this.