Nov 24, 2009 · Usually I would expect a String.contains() method, but there doesn't seem to be one. What is a reasonable way to check for this?

16 ES6 contains inbuilt method (includes) in String's prototype, which can be used to check if string contains another string or not.

Possible Duplicates: Check if text is in a string JavaScript: string contains I'm trying to check if a string I import into my application has a certain piece of text. I know how to do this w...

Apr 7, 2011 · Pretty straight forward. In javascript, I need to check if a string contains any substrings held in an array.

1168 This question already has answers here: How to check whether a string contains a substring in JavaScript? (3 answers)

May 25, 2016 · 71 How can I check if a string contains any element of an array? I want to filter some array if the element has some string. Please see below code.

Oct 22, 2012 · Possible Duplicate: JavaScript: string contains I have a postcode variable and want to use JS to add a location into a different variable when the postcode is changed/entered. So …

Mar 12, 2010 · This only truly solves the problem if all the JavaScript libraries or modules you use also do this. A Gotcha: Execution Scope in Browsers and Node.js While browser polyfills make …

6 In javascript the includes () method can be used to determines whether a string contains particular word (or characters at specified position). Its case sensitive.

Jul 8, 2009 · How do I check if a particular key exists in a JavaScript object or array? If a key doesn't exist, and I try to access it, will it return false? Or throw an error?