if (this.titles.includes(e.target.value)) {
//取消勾选
Array.prototype.indexOf = function (val) {
for (let i = 0; i < this.length; i++) {
if (this[i] == val) return i;
}
return -1;
};
Array.prototype.remove = function (val) {
let index = this.indexOf(val);
if (index > -1) {
this.splice(index, 1);
}
};
this.titles.remove(e.target.value)
} else {
this.titles.push(e.target.value);
}