Firefox：在 keydown 事件对象中没有名为 inputType 的字段

Question

我有一个 input 事件和一个 keydown 事件绑定到 angular 中的文本框。在 keydown 事件函数中，我收到一个 input 对象作为表示 firefox 事件的对象。同时，我在 chrome 中收到同一事件的 InputEvent 对象。我正在使用 chrome 中 InputEvent 对象中的 inputType 字段来确定它是给定的 insertText、deleteContentBackward 还是 deleteContentForward 事件下面。

switch(event.inputType) {
   case 'insertText':
     //do something
   break;
   case 'deleteContentBackward':
     //do something
   break;
   case 'deleteContentForward':
     //do something
   break;
}

问题是 firefox 生成的事件对象中没有名为 inputType 的字段。

Chrome (71.0.3578.98) 中的事件对象

InputEvent {
        bubbles: true,
        cancelBubble: false,
        cancelable: false,
        composed: true,
        currentTarget: null,
        data: null,
        dataTransfer: null,
        defaultPrevented: true,
        detail: 0,
        eventPhase: 0,
        **inputType: "deleteContentBackward"**,
        isComposing: false,
        isTrusted: true,
        path: (15) [input#search-input.form-control.custom-input.ng-valid.ng-dirty.ng-touched, div.col-md-9.search-input-container, div.col-12.no-padding.search.custom-search-box, div.row.input-group.col-lg-6.col-md-7.col-sm-9.col-xs-12, div.search-section.col-12, app-search-header, div.container, section#homeBanner.intro, app-header, app-root, div.wrapper, body.is-search-open, html.no-js, document, Window],
        returnValue: false,
        sourceCapabilities: null,
        srcElement: input#search-input.form-control.custom-input.ng-valid.ng-dirty.ng-touched,
        target: input#search-input.form-control.custom-input.ng-valid.ng-dirty.ng-touched,
        timeStamp: 2484875.1999999997,
        type: "input",
        view: null,
        which: 0
    }

下面给出的是 firefox (65.0b7) 中的相同事件对象

input{
        bubbles: true,
        cancelBubble: false,
        cancelable: false,
        composed: true,
        currentTarget: null,
        defaultPrevented: false,
        detail: 0,
        eventPhase: 0,
        explicitOriginalTarget: <input id="search-input" class="form-control custom-inpu…lid ng-dirty ng-touched" _ngcontent-c10="" type="text" ng-reflect-model="a" placeholder="What are you looking for ?">,
        isComposing: false,
        isTrusted: true,
        layerX: 0,
        layerY: 0,
        originalTarget: <input id="search-input" class="form-control custom-inpu…lid ng-dirty ng-touched" _ngcontent-c10="" type="text" ng-reflect-model="a" placeholder="What are you looking for ?">,
        pageX: 0,
        pageY: 0,
        rangeOffset: 0,
        rangeParent: null,
        returnValue: true,
        srcElement: <input id="search-input" class="form-control custom-inpu…lid ng-dirty ng-touched" _ngcontent-c10="" type="text" ng-reflect-model="a" placeholder="What are you looking for ?">
        target: <input id="search-input" class="form-control custom-inpu…lid ng-dirty ng-touched" _ngcontent-c10="" type="text" ng-reflect-model="a" placeholder="What are you looking for ?">,
        timeStamp: 283997,
        **type: "input"**, // For insert and delete events this field won't change
        view: null,
        which: 0
    }

Answer 1

这个问题可以在

中解决

在Angular，我这样解决了问题。

isBackSpace = false;

onKeyDown(event:KeyboardEvent){
  this.isBackSpace = event.which === 8;
  /// rest of the method
}

onSearchChange(event){
  if (event.inputType === 'deleteContentForward' || event.inputType === 'deleteContentBackward' || this.IsBackSpace) {
    // delete event handling code.
  } else {
    // insert event handling code.
  }
  this.isBackSpace = false;
}

Firefox：在 keydown 事件对象中没有名为 inputType 的字段

Firefox : There is no such field called inputType in keydown event object

javascript

firefox

cross-browser

angular