我试图通过按复选框按钮来更改textarea的占位符。我无法让它改变。带有复选框的Textarea占位符
要清楚,我试图设置占位符不是一个值。
我的textarea:
<textarea name="problem" id="problem" rows="3" class="form-control" cols="45" placeholder="Describe your ticket reason in as few words as possible."></textarea>
我的javascript:
<div class="onoffswitch">
<input type="checkbox" onchange="changeplh()" name="onoffswitch" class="onoffswitch-checkbox" value="1" id="myonoffswitch" checked>
<label class="onoffswitch-label" for="myonoffswitch">
<span class="onoffswitch-inner"></span>
<span class="onoffswitch-switch"></span>
</label>
<script>
function changeplh(){
debugger;
var sel = document.getElementById("myonoffswitch");
var textbx = document.getElementById("problem");
var indexe = sel.selectedIndex;
if(indexe == 0) {
$("#problem").val('');
$("#problem").prop("placeholder", "age");
}
if(indexe == 1) {
$("#problem").val('');
$("#problem").prop("placeholder", "name");
}
}
</script>
</div>
我特别需要 - 复选框按钮,改变一个textarea的2个不同的选项的占位符。 EX:点击它一次,它说“年龄”,再次点击它说“名称”,再次点击它说“年龄”等。
你'indexe = sel.selectedIndex',但myonoffswitch'的'ID的元素不是''
@PatrickEvans愚蠢的我,我贴错了textarea。 –