JavaScript Array some() Method

　JavaScript Array Object

some()The method checks if at least one element in the array passes the test implemented by the provided function.

some()The method executes the callback function once for each array index:

• If the function finds an array element that passes the test, thenfindIndex()return immediatelytrueValue

• otherwise, it returnsfalsemeans that no elements pass the test

Note: The some() method does not change the original array.

Syntax:

array.some(callback, thisArg)

var fruits = [&39;Banana', &39;Mango', &39;Apple', &39;Orange';
function hasApple(element) {
　return element === 'Apple';
}
function myFunc() {
document.getElementById('result').innerHTML = fruits.some(hasApple);
}

Browser compatibility

The numbers in the table specify the first browser version that fully supports the some() method:

Parameter value

Technical details

更多实例

将任何值转换为布尔值：

var　arr　=　[true,　'true',　1
function getBoolean(element) {
if (typeof element ===39;string'});　
element = element.toLowerCase().trim();
}
return arr.some(function(t) {
return t === element;
});
}
getBoolean(false);　//　false
getBoolean('false');　　　//　false
getBoolean(0);　//　false
getBoolean(true);　　//　true
getBoolean('true');//　true
getBoolean(1);　//　true

　JavaScript Array Object