“Uncaught (in promise) undefined” error when using with=location in Facebook Graph API query

The error tells you that there is an error but you don´t catch it. This is how you can catch it: You can also just put a console.log(reponse) at the beginning of your API callback function, there is definitely an error message from the Graph API in it. More information: https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Promise/catch Or with async/await:

Escape quotes in JavaScript

You need to escape the string you are writing out into DoEdit to scrub out the double-quote characters. They are causing the onclick HTML attribute to close prematurely. Using the JavaScript escape character, \, isn’t sufficient in the HTML context. You need to replace the double-quote with the proper XML entity representation, ".

Why Is `Export Default Const` invalid?

const is like let, it is a LexicalDeclaration (VariableStatement, Declaration) used to define an identifier in your block. You are trying to mix this with the default keyword, which expects a HoistableDeclaration, ClassDeclaration or AssignmentExpression to follow it. Therefore it is a SyntaxError. If you want to const something you need to provide the identifier and not use default. export by itself accepts a VariableStatement or Declaration to its right. The following is fineexport default Tab; … Read more

Remove all child elements of a DOM node in JavaScript

Option 1 A: Clearing innerHTML. This approach is simple, but might not be suitable for high-performance applications because it invokes the browser’s HTML parser (though browsers may optimize for the case where the value is an empty string). Option 1 B: Clearing textContent As above, but use .textContent. According to MDN this will be faster than innerHTML as browsers won’t invoke their HTML parsers … Read more

How to compare arrays in JavaScript?

To compare arrays, loop through them and compare every value: Comparing arrays: Usage: You may say “But it is much faster to compare strings – no loops…” well, then you should note there ARE loops. First recursive loop that converts Array to string and second, that compares two strings. So this method is faster than use … Read more

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