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"
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
你可以替换
<input type="text" id="userid" name="userid" value="Please enter the user ID" />
:
<input type="text" id="userid" name="userid" placeholder="Please enter the user ID" />
占位符用来替换值,就像你希望人们能够在文本框中键入而无需多次单击或使用ctrl + a。占位符使它不是一个值,但顾名思义,它是一个占位符。这就是在许多在线表单中使用的“用户名在这里”或“电子邮件”,当你点击它时,“电子邮件”消失,你可以立即开始输入。
其他回答
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();
}
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();
}
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); });
};
在我看来,列出的答案是不完整的。我在下面链接了两个如何在Angular和JQuery中做到这一点的例子。
该方案具有以下特点:
适用于所有支持JQuery, Safari, Chrome, IE, Firefox等浏览器。 适用于Phonegap/Cordova: Android和IOs。 只选择所有一次输入得到焦点,直到下一个模糊,然后焦点 可以使用多个输入,而且不会出现故障。 Angular指令有很好的重用性,只需添加指令select-all-on-click即可 JQuery可以很容易地修改
JQuery: http://plnkr.co/edit/VZ0o2FJQHTmOMfSPRqpH?p=preview
$("input").blur(function() {
if ($(this).attr("data-selected-all")) {
//Remove atribute to allow select all again on focus
$(this).removeAttr("data-selected-all");
}
});
$("input").click(function() {
if (!$(this).attr("data-selected-all")) {
try {
$(this).selectionStart = 0;
$(this).selectionEnd = $(this).value.length + 1;
//add atribute allowing normal selecting post focus
$(this).attr("data-selected-all", true);
} catch (err) {
$(this).select();
//add atribute allowing normal selecting post focus
$(this).attr("data-selected-all", true);
}
}
});
角: http://plnkr.co/edit/llcyAf?p=preview
var app = angular.module('app', []);
//add select-all-on-click to any input to use directive
app.directive('selectAllOnClick', [function() {
return {
restrict: 'A',
link: function(scope, element, attrs) {
var hasSelectedAll = false;
element.on('click', function($event) {
if (!hasSelectedAll) {
try {
//iOS, Safari, thows exception on Chrome etc
this.selectionStart = 0;
this.selectionEnd = this.value.length + 1;
hasSelectedAll = true;
} catch (err) {
//Non iOS option if not supported, e.g. Chrome
this.select();
hasSelectedAll = true;
}
}
});
//On blur reset hasSelectedAll to allow full select
element.on('blur', function($event) {
hasSelectedAll = false;
});
}
};
}]);
用这个:
var textInput = document.querySelector(“input”); textInput.onclick = function() { 文本输入选择开始 = 0; textInput.selectionEnd = textInput.value.length; } <输入类型=“文本”>