maxlength属性对<input type="number">不起作用。这只发生在Chrome。
<input type="number" class="test_css" maxlength="4" id="flight_number" name="number"/>
maxlength属性对<input type="number">不起作用。这只发生在Chrome。
<input type="number" class="test_css" maxlength="4" id="flight_number" name="number"/>
当前回答
试着用tel:
maxlength="5" type="tel"
其他回答
许多人张贴的onKeyDown()事件根本不工作,即你不能删除一旦你达到限制。因此,使用onKeyPress()而不是onKeyDown(),它工作得很好。
下面是工作代码:
用户将不允许输入超过4位数字 < br > <input type="number" pattern="/^-?\d+\.? "\d*$/" onKeyPress="if(this.value.length==4) return false;"/>
对于React用户,
只需将10替换为您的最大长度要求
<input type="number" onInput={(e) => e.target.value = e.target.value.slice(0, 10)}/>
最大长度-输入类型文本
<input type="email" name="email" maxlength="50">
使用jQuery:
$("input").attr("maxlength", 50)
最大输入类型号
JS
function limit(element, max) {
var max_chars = max;
if(element.value.length > max_chars) {
element.value = element.value.substr(0, max_chars);
}
}
HTML
<input type="number" name="telefono" onkeydown="limit(this, 20);" onkeyup="limit(this, 20);">
完成了!只有数字和maxlength工作完美。
<input maxlength="5" data-rule-maxlength="5" style="height:30px;width: 786px;" type="number" oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength); this.value = this.value.replace(/[^0-9.]/g, '').replace(/(\..*)\./g, '$1');" />
我知道已经有一个答案,但如果你想让你的输入行为完全像maxlength属性或尽可能接近,使用以下代码:
(function($) {
methods = {
/*
* addMax will take the applied element and add a javascript behavior
* that will set the max length
*/
addMax: function() {
// set variables
var
maxlAttr = $(this).attr("maxlength"),
maxAttR = $(this).attr("max"),
x = 0,
max = "";
// If the element has maxlength apply the code.
if (typeof maxlAttr !== typeof undefined && maxlAttr !== false) {
// create a max equivelant
if (typeof maxlAttr !== typeof undefined && maxlAttr !== false){
while (x < maxlAttr) {
max += "9";
x++;
}
maxAttR = max;
}
// Permissible Keys that can be used while the input has reached maxlength
var keys = [
8, // backspace
9, // tab
13, // enter
46, // delete
37, 39, 38, 40 // arrow keys<^>v
]
// Apply changes to element
$(this)
.attr("max", maxAttR) //add existing max or new max
.keydown(function(event) {
// restrict key press on length reached unless key being used is in keys array or there is highlighted text
if ($(this).val().length == maxlAttr && $.inArray(event.which, keys) == -1 && methods.isTextSelected() == false) return false;
});;
}
},
/*
* isTextSelected returns true if there is a selection on the page.
* This is so that if the user selects text and then presses a number
* it will behave as normal by replacing the selection with the value
* of the key pressed.
*/
isTextSelected: function() {
// set text variable
text = "";
if (window.getSelection) {
text = window.getSelection().toString();
} else if (document.selection && document.selection.type != "Control") {
text = document.selection.createRange().text;
}
return (text.length > 0);
}
};
$.maxlengthNumber = function(){
// Get all number inputs that have maxlength
methods.addMax.call($("input[type=number]"));
}
})($)
// Apply it:
$.maxlengthNumber();