let arr = [5, 15, 25, 30, 35];
console.log(arr); //result [5, 15, 25, 30, 35]
let index = arr.indexOf(30);

if (index > -1) {
   arr.splice(index, 1);
}
console.log(arr); //result [5, 15, 25, 35]

请不要使用带有delete的变体-它会在数组中留下一个洞，因为它不会在删除的项之后重新索引元素。

> Array.prototype.remove=function(v){
...     delete this[this.indexOf(v)]
... };
[Function]
> var myarray=["3","24","55","2"];
undefined
> myarray.remove("55");
undefined
> myarray
[ '3', '24', , '2' ]

真的，我不明白为什么不能用

arr = arr.filter(value => value !== 'seven');

或者你可能想使用普通的JS

arr = arr.filter(function(value) { return value !== 'seven' });

这可以是一个全局函数或一个自定义对象的方法，如果你不允许添加到本机原型。它从数组中删除与任何参数匹配的所有项。

Array.prototype.remove = function() {
    var what, a = arguments, L = a.length, ax;
    while (L && this.length) {
        what = a[--L];
        while ((ax = this.indexOf(what)) !== -1) {
            this.splice(ax, 1);
        }
    }
    return this;
};

var ary = ['three', 'seven', 'eleven'];

ary.remove('seven');

/*  returned value: (Array)
three,eleven
*/

使之成为全球性的

function removeA(arr) {
    var what, a = arguments, L = a.length, ax;
    while (L > 1 && arr.length) {
        what = a[--L];
        while ((ax= arr.indexOf(what)) !== -1) {
            arr.splice(ax, 1);
        }
    }
    return arr;
}
var ary = ['three', 'seven', 'eleven'];
removeA(ary, 'seven');


/*  returned value: (Array)
three,eleven
*/

并照顾IE8及以下-

if(!Array.prototype.indexOf) {
    Array.prototype.indexOf = function(what, i) {
        i = i || 0;
        var L = this.length;
        while (i < L) {
            if(this[i] === what) return i;
            ++i;
        }
        return -1;
    };
}

var index = array.indexOf('item');

if(index!=-1){

   array.splice(index, 1);
}

另一个变化:

if (!Array.prototype.removeArr) {
    Array.prototype.removeArr = function(arr) {
        if(!Array.isArray(arr)) arr=[arr];//let's be nice to people who put a non-array value here.. that could be me!
        var that = this;
        if(arr.length){
            var i=0;
            while(i<that.length){
                if(arr.indexOf(that[i])>-1){
                    that.splice(i,1);
                }else i++;
            }
        }
        return that;
    }
}

它又是循环中的indexOf()，但前提是要删除的数组相对于要清理的数组较小;每次移除都会缩短while循环。