vue自定义指令表单校验

 
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//js
directives: {
        numberOnly: {
            bind: function(el) {
                el.handler = function() {
                    var formatVal = /^\+?[1-9][0-9]*$/;
                    var val = el.value;
                    if(!formatVal.test(val)){
                        var reg = new RegExp(val,'g');
                        el.value = val.replace(reg, 1);
                    }
                }
                el.addEventListener('input', el.handler)
            },
            unbind: function(el) {
                el.removeEventListener('input', el.handler)
            }
        }
    },



//原生