我有以下代码在HTML网页中显示一个文本框。

<input type="text" id="userid" name="userid" value="Please enter the user ID" />

当页面显示时,文本包含“请输入用户ID”消息。但是,我发现用户需要单击3次才能选择所有文本(在本例中是Please enter the user ID)。

是否可以只点击一下就选择整个文本?

编辑:

抱歉,我忘了说:我必须使用input type="text"


当前回答

在输入字段中使用“占位符”而不是“值”。

其他回答

我在vue应用程序中使用焦点属性

<input @focus="$event.target.select()" />

像这样的Html <input type="text" value="点击输入选择" onclick="javascript:textSelector(this)" / >

和javascript代码没有绑定

function textSelector(ele){
    $(ele).select();
}

If you are just trying to have placeholder text that gets replaced when a user selects the element then it is obviously best practice to use placeholder attribute nowadays. However, if you want to select all of the current value when a field gains focus then a combination of @Cory House and @Toastrackenigma answers seems to be most canonical. Use focus and focusout events, with handlers that set/release the current focus element, and select all when focused. An angular2/typescript example is as follows (but would be trivial to convert to vanilla js):

模板:

<input type="text" (focus)="focus()" (focusout)="focusout()" ... >

组件:

private focused = false;

public focusout = (): void => {
    this.focused = false;
};

public focus = (): void => {
    if(this.focused) return;
    this.focused = true;

    // Timeout for cross browser compatibility (Chrome)
    setTimeout(() => { document.execCommand('selectall', null, false); });
};

我认为通过事件来控制更好。这个变体看起来很直观,也适用于ts:

    onFocus={e => {
      e.target.select();
    }

如果你每次点击都需要selectAll,你可以使用这个:

    onClick={e => {
      e.target.focus();
      e.target.select();
    }

输入自动聚焦,onfocus事件:

<INPUT onfocus="this.select()" TYPE="TEXT" NAME="thing" autofocus>

这样就可以打开选中所需元素的表单。它的工作原理是使用自动聚焦来命中输入,然后发送自己一个onfocus事件,该事件反过来选择文本。