您的位置:首页 > Web前端 > JQuery

input中禁止输入特殊字符

2017-10-13 08:55 309 查看
当我们在文本框中输入一些特殊符号时,有些特殊字符传入到后台是会产生错误的,所以我们应该从根本上解决问题。

例图:





当文本框中输入的文本含有特殊符号,就会弹出警示框

源码:

<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="jquery.1.12.4.js"></script>
<script type="text/javascript">

$(document).ready(function(){

$("button").click(function(){
//                var regExp = /,/;
var text = $("input").val();
var pattern = new RegExp("[`~!@#$^&*()=|{}':;',\\[\\].<>/?~!@#¥……&*()——|{}【】‘;:”“'。,、?%]");
var result = text.match(pattern);
if (!result)
{
$("#content").append(text+"<br>");
$("input").val("");
}else{

alert("含有特殊字符")
}
});
});
</script>
</head>
<body>
<div style="width: 400px;width: 400px;margin: auto">
<h3>公告墙</h3>
<div style="width: 300px;height: 300px;border: 1px solid #b3d4fc" id="content"></div>
<div style="margin-left: 50px;margin-top: 10px">输入框:<input type="text"></div>
<div style="width:100px;;margin: auto;margin-top: 10px">
<button>发布</button>
</div>
</div>
</body>
</html>


在这个例子的基础上 我们再进行一些操作

例图:



源码:

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<script type="text/javascript" src="angular-1.3.0.js"></script>
<title>Note Book</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}

li {
height: 24px;
line-height: 24px;
list-style: none;
}

main {
position: relative;
width: 512px;
margin: 0 auto;
}

div {
height: 48px;
line-height: 48px;
}

section {
width: 512px;
}

.ipt {
width: 388px;
margin: 0 auto;
}

.ipt input {
width: 320px;
height: 24px;
}

.btn {
width: 80px;
margin: 0 auto;
}

button {
width: 80px;
height: 24px;
}

.note_list {
width: 512px;
height: 384px;
border: 2px solid #999;
padding: 12px;
}

#toast {
position: absolute;
top: 256px;
left: 128px;
width: 160px;
height: 148px;
background-color: #fff;
border: 1px solid #999;
}

#toast h3 {
text-align: center;
}

#toast h5 {
text-align: center;
}

#toast button {
display: block;
margin: 16px auto;
}
</style>
<script type="text/javascript">
var app = angular.module("myApp", []);

app.constant("tips", {
add_note_empty: ["请输入记录内容", "好吧"],
add_note_exists: ["您记录的内容已经存在", "好吧"],
search_empty: ["请输入搜索内容", "好吧"],
search_success: ["搜到相关内容", "很好"],
search_failure: ["未搜到相关内容", "失望"]
});

app.controller("myCtrl", function ($scope, tips) {
var tipsShow = function (tips) {
$scope.tips_message = tips[0];
$scope.tips_btn = tips[1];
$scope.tips_is_show = true;
console.log($scope.tips_message);
console.log($scope.tips_btn);
console.log($scope.tips_is_show);
};

var tipsHide = function () {
$scope.tips_is_show = false;
};

$scope.noteList = []; // 保存账本所有记录。

$scope.addNote = function () {
if ($scope.note == undefined) {
tipsShow(tips.add_note_empty);
return;
}

var note = $scope.note.trim();

if (note.length == 0) {
tipsShow(tips.add_note_empty);
return;
}

if ($scope.noteList.indexOf($scope.note) >= 0) {
tipsShow(tips.add_note_exists);
$scope.note = "";
return;
}

$scope.noteList.push($scope.note);
$scope.note = "";
};

$scope.search = function () {
if ($scope.keyword == undefined || $scope.keyword.length == 0) {
tipsShow(tips.search_empty);
return;
}
if ($scope.noteList.indexOf($scope.keyword) >= 0) {
tipsShow(tips.search_success);
} else {
tipsShow(tips.search_failure);
}
$scope.keyword = "";
};

$scope.tipsHide = function () {
tipsHide();
}
});
</script>
</head>
<body ng-app="myApp">
<main ng-controller="myCtrl">

<div>记账本</div>

<div class="note_list">
<ul>
<li ng-repeat="value in noteList">{{ value }}</li>
</ul>
</div>

<section>
<div class="ipt">输入框:<input type="text" size="48" ng-model="note"/></div>
</section>

<section>
<div class="btn">
<button ng-click="addNote()">记录</button>
</div>
</section>

<section>
<div class="ipt">搜索框:<input type="text" size="48" ng-model="keyword"/></div>
</section>

<section>
<div class="btn">
<button ng-click="search()">搜索</button>
</div>
</section>

<div id="toast" ng-if="tips_is_show">
<h3>提示</h3>
<h5>{{ tips_message }}</h5>
<button ng-click="tipsHide()">{{ tips_btn }}</button>
</div>
</main>
</body>
</html>
内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签:  javascript jquery 源码