这么多年过去了，仍然没有现成的 HTML5 解决方案。
我正在使用<input type="tel"> 或<input type="text">（“tel”在 Android 和 iOS 中会显示一个数字键盘，在某些情况下这是一个奖励。）
然后我需要一个指令来：
- 过滤掉非数字字符
- 在用户输入时添加千位分隔符
- 使用
$parsers和keyup设置elem.val()和$formatters设置显示...
- ...在幕后，为
ng-model分配一个浮点数
下面的指令示例执行此操作，它接受负数和浮点数，除非您指定只需要正数或整数。
这不是我想要的完整解决方案，但我认为它弥补了差距。
HTML
<input type="text" ng-model="someNumber" number-input />
JAVASCRIPT
myApp.directive('numberInput', function($filter) {
return {
require: 'ngModel',
link: function(scope, elem, attrs, ngModelCtrl) {
ngModelCtrl.$formatters.push(function(modelValue) {
return setDisplayNumber(modelValue, true);
});
// it's best to change the displayed text using elem.val() rather than
// ngModelCtrl.$setViewValue because the latter will re-trigger the parser
// and not necessarily in the correct order with the changed value last.
// see http://radify.io/blog/understanding-ngmodelcontroller-by-example-part-1/
// for an explanation of how ngModelCtrl works.
ngModelCtrl.$parsers.push(function(viewValue) {
setDisplayNumber(viewValue);
return setModelNumber(viewValue);
});
// occasionally the parser chain doesn't run (when the user repeatedly
// types the same non-numeric character)
// for these cases, clean up again half a second later using "keyup"
// (the parser runs much sooner than keyup, so it's better UX to also do it within parser
// to give the feeling that the comma is added as they type)
elem.bind('keyup focus', function() {
setDisplayNumber(elem.val());
});
function setDisplayNumber(val, formatter) {
var valStr, displayValue;
if (typeof val === 'undefined') {
return 0;
}
valStr = val.toString();
displayValue = valStr.replace(/,/g, '').replace(/[A-Za-z]/g, '');
displayValue = parseFloat(displayValue);
displayValue = (!isNaN(displayValue)) ? displayValue.toString() : '';
// handle leading character -/0
if (valStr.length === 1 && valStr[0] === '-') {
displayValue = valStr[0];
} else if (valStr.length === 1 && valStr[0] === '0') {
displayValue = '';
} else {
displayValue = $filter('number')(displayValue);
}
// handle decimal
if (!attrs.integer) {
if (displayValue.indexOf('.') === -1) {
if (valStr.slice(-1) === '.') {
displayValue += '.';
} else if (valStr.slice(-2) === '.0') {
displayValue += '.0';
} else if (valStr.slice(-3) === '.00') {
displayValue += '.00';
}
} // handle last character 0 after decimal and another number
else {
if (valStr.slice(-1) === '0') {
displayValue += '0';
}
}
}
if (attrs.positive && displayValue[0] === '-') {
displayValue = displayValue.substring(1);
}
if (typeof formatter !== 'undefined') {
return (displayValue === '') ? 0 : displayValue;
} else {
elem.val((displayValue === '0') ? '' : displayValue);
}
}
function setModelNumber(val) {
var modelNum = val.toString().replace(/,/g, '').replace(/[A-Za-z]/g, '');
modelNum = parseFloat(modelNum);
modelNum = (!isNaN(modelNum)) ? modelNum : 0;
if (modelNum.toString().indexOf('.') !== -1) {
modelNum = Math.round((modelNum + 0.00001) * 100) / 100;
}
if (attrs.positive) {
modelNum = Math.abs(modelNum);
}
return modelNum;
}
}
};
});
https://jsfiddle.net/benlk/4dto9738/