JavaScript-聚合物纸波纹

我试图在按下按钮时更改元素的颜色.
我希望在按下按钮并更改颜色时在该元素中触发纸张波纹效果.

我应该怎么做？

目标元素：

<paper-toolbar class="abc">
    <paper-icon-button icon="menu" paper-drawer-toggle></paper-icon-button>
    <div flex class="indent title">Heading</div>
</paper-toolbar>                

触发元素：

<paper-button class="def background-blue"></paper-button>
<paper-button class="def background-red"></paper-button>

Javascript：

$(".def").click(function(){
    $(".abc").css("background-color", $(this).css("background-color"));
});

解决方法:

代替直接在纸张工具栏上直接操作样式,一种更多的元素方法是在纸张工具栏旁边添加一个paper-ripple元素,并在您的纸张按钮上调用mousedown / mouseup时手动调用downAction / upAction.

<paper-header-panel class="fit">
    <paper-toolbar class="toolbar">
        <paper-icon-button icon="menu" paper-drawer-toggle></paper-icon-button>
        <div flex class="indent title">Heading</div>

        <paper-ripple id="ripple" center></paper-ripple>
    </paper-toolbar> 

    <div>
        <paper-button class="def background-blue"raised on-mousedown="_onMousedown" on-mouseup="_onMouseup">Go blue</paper-button>
        <paper-button class="def background-red" raised on-mousedown="_onMousedown" on-mouseup="_onMouseup">Go red</paper-button>
    </div>
</paper-header-panel>

请注意,纸波纹的背景色是彩色.

_assignColor: function(e) {
     var button = Polymer.dom(e).localTarget;
     var ripple = this.$.ripple;

     $(ripple).css("color", $(button).css("background-color"));  

     // or without jQuery
     //var buttonStyle = getComputedStyle(button, null);
     //ripple.style.color = buttonStyle.backgroundColor;        
},

 _onMousedown: function (e) {
    this._assignColor(e);

     this.$.ripple.downAction({x: e.x, y: e.y});
 },

 _onMouseup: function (e) {
     this._assignColor(e);

     this.$.ripple.upAction();
 }   

看看这个plunker.

标签：material-design,polymer,polymer-1-0,javascript,jquery
来源： https://codeday.me/bug/20191119/2038204.html