JavaScript TypeError – ‘X’ is not iterable
Last Updated :
22 May, 2023
This JavaScript exception is not iterable occurs if the value present at the right-hand-side of for…of or as argument of a function such as Promise.all or TypedArray.from, can not be iterated or is not an iterable object.
Message:
TypeError: 'x' is not iterable (Firefox, Chrome)
TypeError: 'x' is not a function or its return value is not iterable (Chrome)
Error Type:
TypeError
Cause of Error: Somewhere in the code, the value present at the right-hand-side of for…of or as argument of a function such as Promise.all or TypedArray.from, is used like it can be iterated or is an iterable object.
Example 1: In this example, the GFG_Obj is not iterable, So the error has occurred.
Javascript
let GFG_Obj = { 'prop1' : 'val1' , 'prop2' : 'val2' };
for (let x of GFG_Obj) {
}
|
Output(in console):
TypeError: GFG_Obj is not iterable
Example 2: In this example, the GFG is not iterable, So the error has occurred.
Javascript
function * GFG(a, b) {
yield a;
yield b;
}
for (let y of GFG)
console.log(x);
|
Output(in console):
TypeError: GFG is not iterable
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