How to use 'object destruction in javascript' in JavaScript

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doDestroy(obj: any): void {
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  if (this.definition.destroyMethod && obj[this.definition.destroyMethod]) {
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    obj[this.definition.destroyMethod].call(obj);
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  }
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}

66
public destroyObject(obj:GameObject) {
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    var key = obj.key;
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    if (this._pool[key] == null) {
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        this._pool[key] = [];
70
    }
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    this._pool[key].push(obj);
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    obj.onDestroy();
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    var index = this._list.indexOf(obj);
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    if (index != -1) {
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        this._list.splice(index, 1);
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    }
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}