This question already has answers here: Uncaught ReferenceError: $ is not defined? (40 answers) Closed 5 years ago. I have implemented some JavaScript on my site but I keep getting the following error messages: Uncaught ReferenceError: jQuery is not defined and Uncaught SyntaxError: Unexpected token < This is the JavaScript that I am using in … Read more
I think the easiest approach would be to just check that el is not null before adding an event listener:
How come this code throws an Uncaught ReferenceError: $ is not defined when it was OK before? Results in tabs don’t close anymore. jQuery is referenced in the header:
The JSON you posted looks fine, however in your code, it is most likely not a JSON string anymore, but already a JavaScript object. This means, no more parsing is necessary. You can test this yourself, e.g. in Chrome’s console: JSON.parse() converts the input into a string. The toString() method of JavaScript objects by default … Read more
What is the best way to copy text to the clipboard (multi-browser)? I have tried: But in Internet Explorer it gives a syntax error. In Firefox, it says unsafeWindow is not defined. A nice trick without using Flash: How does Trello access the user’s clipboard?
Update: ECMAScript 6 (ES6) introduces a new type of literal, namely template literals. They have many features, variable interpolation among others, but most importantly for this question, they can be multiline. A template literal is delimited by backticks: (Note: I’m not advocating to use HTML in strings) Browser support is OK, but you can use … Read more
hasOwnProperty returns a boolean value indicating whether the object on which you are calling it has a property with the name of the argument. For example: However, it does not look at the prototype chain of the object. It’s useful to use it when you enumerate the properties of an object with the for…in construct. … Read more
You have to place the hello div before the script, so that it exists when the script is loaded.
How to make a word underline in Markdown? For example: bold = **bold** or __bold__, italic = *Italic* or _Italic_. I have tried with 2 and 3 underscores, but it is not working. Also tried by taking the reference of markdown-it.js.