How to use “setTimeout” to invoke object itself

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心在旅途
心在旅途 2020-12-01 04:37

Why can\'t I use setTimeout in a javascript object?

Message = function () {

    ...
    ...        

    this.messageFactory = ...
    this.fee         


        
3条回答
  •  失恋的感觉
    2020-12-01 05:24

    A neater way is to just pass this as an argument to the function being called in the timeout:

    function delayRemove(obj) {
      setTimeout(function(_this) {
          _this.feedbackTag.removeChild(obj);
        }, 5000, this);
    }
    

    You should really pass obj as an argument as well, just to make sure it is in scope (the number of parameters is unlimited):

    function delayRemove(obj) {
      setTimeout(function(_this, removeObj) {
          _this.feedbackTag.removeChild(removeObj);
        }, 5000, this, obj);
    }
    

    HTML5 and Node.js extended the setTimeout function to accept parameters which are passed to your callback function. It has the following method signature.

    setTimeout(callback, delay, [param1, param2, ...])

    As setTimeout isn't actually a JavaScript feature your results may vary across browsers. I couldn't find any concrete details of support, however as I said this is in the HTML5 spec.

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