Note: This is an updated answer. Comments below refer to an old version which messed around with keycodes. JavaScript Try it yourself on JSFiddle. You can filter the input values of a text <input> with the following setInputFilter function (supports Copy+Paste, Drag+Drop, keyboard shortcuts, context menu operations, non-typeable keys, the caret position, different keyboard layouts, … Read more
DateTime.remove({}, callback) The empty object will match all of them.
For security reasons, your local drive is declared to be “other-domain” and will taint the canvas. (That’s because your most sensitive info is likely on your local drive!). While testing try these workarounds: Put all page related files (.html, .jpg, .js, .css, etc) on your desktop (not in sub-folders). Post your images to a site … Read more
You need to send the ID as the function parameters. Do it like this: Expand snippet This will send the ID this.id as clicked_id which you can use in your function. See it in action here.
To remove the commas, you’ll need to use replace on the string. To convert to a float so you can do the maths, you’ll need parseFloat:
From this post: How to deal with floating point number precision in JavaScript? You have a few options: Use a special datatype for decimals, like decimal.js Format your result to some fixed number of significant digits, like this: (Math.floor(y/x) * x).toFixed(2) Convert all your numbers to integers
Short answer: If you want to know more, keep reading. Do you want to stop JavaScript’s execution for developing/debugging? The expression debugger; in your code, will halt the page execution, and then your browser’s developer tools will allow you to review the state of your page at the moment it was frozen. Do you want … Read more
no initialization (that i know of) Update Since ever posting this answer 4 years ago, people seem to keep coming back here for this answer. For benchmarking purposes I made a JSPerf with some different solutions. The solution above here isn’t the quickest, although it’s short. To stick to the same short style, but with … Read more
npm start runs a script that the app maker built for easy starting of the app npm install installs all the packages in package.json run npm install first then run npm start
2nd October 2020: note that many bare-bones approaches are fraught with subtle bugs (eg. whitespace, implicit partial parsing, radix, coercion of arrays etc.) that many of the answers here fail to take into account. The following implementation might work for you, but note that it does not cater for number separators other than the decimal … Read more