JavaScript: Check whether the provided argument is array-like
JavaScript fundamental (ES6 Syntax): Exercise-205 with Solution
Write a JavaScript program to check if the provided argument is an array (i.e. iterable).
- Check if the provided argument is not null and that its Symbol.iterator property is a function.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const isArrayLike = val => {
try {
return [...val], true;
} catch (e) {
return false;
}
};
console.log(isArrayLike(document.querySelectorAll('.className'))); // true
console.log(isArrayLike('abc')); // true
console.log(isArrayLike(null)); // false
Sample Output:
true true false
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-205-1 by w3resource (@w3resource) on CodePen.
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