[英]jQuery: onclick event not working when onkeyup working
我是JS / jQuery的新手,并使用以下代码尝试实现:
<a>
)以更改<input>
值 <input>
输入一些数字 到目前为止一切都按预期工作但是
当我在<input>
输入一些数字时,我不能再单击该按钮了
以下是密钥代码的部分内容
$(document).on("keyup", "#buy-num", function(event){
event.preventDefault();
var t = $.trim( $buynum.val() );
console.log(t);
if( isNaN(Number(t)) || isEmpty(Number(t)) || isFloat(Number(t)) || Number(t) > 99 || Number(t) < 1 ){
alert("Please input 1~99 ");
}else{
$buynum.attr("value", Number(t));
}
console.log("test");
// event.stopImmediatePropagation();
});
您希望使用$.val()
而不是$.attr('value')
更新元素。
$(document).ready(function(){ var $add = $("#btn-add"); var $reduce = $("#btn-reduce"); var $buynum = $("#buy-num"); var count = Number($buynum.val()); $(document).on("click", "#btn-add", function(event){ event.preventDefault(); var count = Number($buynum.val()); var number = count + 1; if (number >= 199){ $add.addClass("disabled"); $reduce.removeClass("disabled"); $buynum.val(199); } else { $add.removeClass("disabled"); $buynum.val(number); } // event.stopImmediatePropagation(); // return false; }); // reduce $(document).on("click", "#btn-reduce", function(event){ event.preventDefault(); var count = Number($buynum.val()); var number = count - 1; if (number <= 1){ $buynum.val(1); $reduce.addClass("disabled"); $add.removeClass("disabled"); } else { $reduce.removeClass("disabled"); $buynum.val(number); } // event.stopImmediatePropagation(); // return false; }); // onkeyup $(document).on("keyup", "#buy-num", function(event){ event.preventDefault(); var t = $.trim( $buynum.val() ); console.log(t); // if ( isNaN(Number(t)) || t.length==0 || isFloat(Number(t)) || Number(t) > 199 || Number(t) < 1 ) { if ( isNaN(Number(t)) || isEmpty(Number(t)) || isFloat(Number(t)) || Number(t) > 199 || Number(t) < 1 ) { alert("请输入 1~199 之间的整数"); } else { $buynum.val(Number(t)); } console.log("test"); return // event.stopImmediatePropagation(); }); }); function isEmpty(t){ return "" == $.trim(t) } function isFloat(t){ return Number(t) === t && t % 1 !== 0 }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input class="text buy-num" id="buy-num" value="1"> <a class="btn-reduce" id="btn-reduce" name="btn-reduce" href="#none">-</a> <a class="btn-add" id="btn-add" name="add" href="#none">+</a>
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