javascript 基于下拉选择的调用函数
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Call function based on dropdown selection
提问by Lemonio
I have the following dropdown
我有以下下拉菜单
<select onchange="myFunc(argument here)" id="propertydropdown">
<option value="tags">blah</option>
<option value="tags2">blahblah</option>
<option value="tags3">blahblahblah</option>
</select>
how do i get the argument to be the value of the option currently selected?
我如何让参数成为当前选择的选项的值？
回答by Bergi
回答by SimonR
I'm not sure how you could pass the selected value as an argument, but what you could do is within the handler itself use thisto work out the value (thiswill be the select):
我不确定如何将选定的值作为参数传递，但您可以做的是在处理程序本身内用于this计算值（this将是选择）：
function myFunc() {
var value = this.options[ this.selectedIndex ].value;
// ...do stuff
}
You might even be able to do onclick="myFunc( this.options[ this.selectedIndex ].value );", but I haven't tried that.
你甚至可以这样做onclick="myFunc( this.options[ this.selectedIndex ].value );"，但我还没有尝试过。
