This content originally appeared on DEV Community and was authored by Chris Bongers
You might have heard of the JavaScript startsWith method. It can check if a particular string starts with another string.
To give you a demonstration it would work something like this:
const string = 'Hi, and welcome from JavaScript';
console.log(string.startsWith('Hi'));
// true
console.log(string.startsWith('Hello'));
// false
Checking for multiple conditions with startsWith
But what if we want to check if a string starts with a multiplication of strings?
So let's say Hi and Hello would both be fine.
We could use a conditional statement. However, this might get very unorganized if we decide to allow more strings at a later stage.
However, it would look like this:
const string = 'Hi, and welcome from JavaScript';
const result = string.startsWith('Hi') || string.startsWith('Hello');
console.log(result);
// true
Another way is to use the same method on a predefined array. I quite like the simplicity and naming of this method as it really states what's happening.
This is what it looks like:
const result = ['Hi', 'Hello'].some(word => string.startsWith(word));
console.log(result);
// true
Feel free to try these out in the following CodePen.
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This content originally appeared on DEV Community and was authored by Chris Bongers
Chris Bongers | Sciencx (2021-12-01T09:19:14+00:00) JavaScript startsWith and multiple conditions. Retrieved from https://www.scien.cx/2021/12/01/javascript-startswith-and-multiple-conditions/
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