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Detailed explanation of JS imitation Alipay input text input box amplification component
Detailed explanation of JS imitation Alipay input text input box amplification component
Jan 19, 2018 pm 01:03 PM
This article mainly brings you an example of a JS imitation Alipay input text input box amplification component. The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor to take a look, I hope it can help everyone.
You can display a digital magnifying glass behind when inputting
<!doctype html>
<html lang="en">
?<head>
?<meta charset="UTF-8">
?<title>JS?仿支付寶input文本輸入框放大組件</title>
?<script src="js/jquery.min.js"></script>
?<style>
??*?{?margin:?0;?padding:?0;?border-width:?1px;?}
??.parentCls?{margin:5px?60px?0;}
??.js-max-input?{border:?solid?1px?#ffd2b2;?position:relative;background:?#fffae5;padding:?0?10px?0?10px;font-size:20px;color:?#ff4400}
??.inputElem4{?width:?300px;?height:?36px;?border:?1px?solid?#E0E0E0;?padding-left:?10px;?line-height:?36px;?font-size:?14px;?}
?</style>
?</head>
?<body>
?<p class="parentCls">
??<input type="text" class="inputElem4" autocomplete = "off" maxlength="18"/>
?</p>
??<script src="js/jq22.js"></script>
??<script>
???//?初始化
???$(function(){
???new?TextMagnifier({
????inputElem:?'.inputElem4',
????align:?'bottom',
????splitType:?[6,4,4,4]
???});
???});
??</script>
?</body>
</html>
/**
?*?JS?仿支付寶的文本輸入框放大組件
?*/?
?function?TextMagnifier(options)?{
??this.config?=?{
??
??inputElem???:??'.inputElem',??//?輸入框目標(biāo)元素
??parentCls???:??'.parentCls',??//?目標(biāo)元素的父類
??align????:??'right',???//?對(duì)齊方式有?['top','bottom','left','right']四種?默認(rèn)為top
??splitType???:??[3,4,4],???//?拆分規(guī)則
??delimiter???:??'-'????//?分隔符可自定義
??};
??this.cache?=?{
???isFlag?:?false
??};
??this.init(options);
?}
?TextMagnifier.prototype?=?{
??
??constructor:?TextMagnifier,
??init:?function(options)?{
??this.config?=?$.extend(this.config,options?||?{});
??var?self?=?this,
???_config?=?self.config,
???_cache?=?self.cache;
??
??self._bindEnv();
??
??
??},
??/*
??*?在body后動(dòng)態(tài)添加HTML內(nèi)容
??*?@method?_appendHTML
??*/
??_appendHTML:?function($this,value)?{
???var?self?=?this,
????_config?=?self.config,
????_cache?=?self.cache;
???var?html?=?'',
????$parent?=?$($this).closest(_config.parentCls);
????if($('.js-max-input',$parent).length?==?0)?{
????html?+=?'<p class="js-max-input"></p>';
????$($parent).append(html);
????}
????var?value?=?self._formatStr(value);
????$('.js-max-input',$parent).html(value);
??},
??/*
??*?給目標(biāo)元素定位
??*?@method?_position
??*?@param?target
??*/
??_position:?function(target){
??var?self?=?this,
???_config?=?self.config;
??var?elemWidth?=?$(target).outerWidth(),
???elemHeight?=?$(target).outerHeight(),
???elemParent?=?$(target).closest(_config.parentCls),
???containerHeight?=?$('.js-max-input',elemParent).outerHeight();?
??
??$(elemParent).css({"position":'relative'});
??
??switch(true){
???
???case?_config.align?==?'top':
????
????$('.js-max-input',elemParent).css({'position':'absolute','top'?:-elemHeight?-?containerHeight/2,'left':0});
????break;
???
???case?_config.align?==?'left':
????$('.js-max-input',elemParent).css({'position':'absolute','top'?:0,'left':0});
????break;
???
???case?_config.align?==?'bottom':
????$('.js-max-input',elemParent).css({'position':'absolute','top'?:elemHeight?+?4?+?'px','left':0});
????break;
???
???case?_config.align?==?'right':
????$('.js-max-input',elemParent).css({'position':'absolute','top'?:0,'left':elemWidth?+?2?+?'px'});
????break;
??}
??},
??/**
??*?綁定事件
??*?@method?_bindEnv
??*/
??_bindEnv:?function(){
??var?self?=?this,
???_config?=?self.config,
???_cache?=?self.cache;
??//?實(shí)時(shí)監(jiān)聽輸入框值的變化
??$(_config.inputElem).each(function(index,item){
???$(item).keyup(function(e){
????var?value?=?$.trim(e.target.value),
?????parent?=?$(this).closest(_config.parentCls);
????if(value?==?'')?{
?????self._hide(parent);
????}else?{
?????var?html?=?$.trim($('.js-max-input',parent).html());
?????if(html?!=?'')?{
??????self._show(parent);
?????}
????}
????self._appendHTML($(this),value);
????self._position($(this));
???});
???$(item).unbind('focusin');
???$(item).bind('focusin',function(){
????var?parent?=?$(this).closest(_config.parentCls),
?????html?=?$.trim($('.js-max-input',parent).html());
????if(html?!=?'')?{
?????self._show(parent);
????}
???});
???$(item).unbind('focusout');
???$(item).bind('focusout',function(){
????var?parent?=?$(this).closest(_config.parentCls);
????self._hide(parent);
???});
??});
??},
??/**
??*?格式化下
??*?@method?_formatStr
??*/
??_formatStr:?function(str){
??var?self?=?this,
???_config?=?self.config,
???_cache?=?self.cache;
??var?count?=?0,
???output?=?[];
??for(var?i?=?0,?ilen?=?_config.splitType.length;?i?< ilen; i++){
var s = str.substr(count,_config.splitType[i]);
if(s.length >?0){
????output.push(s);
???}
???count+=?_config.splitType[i];
??}
??return?output.join(_config.delimiter);
??},
??/*
??*?顯示?放大容器
??*?@method?_show
??*/
??_show:?function(parent)?{
??var?self?=?this,
???_config?=?self.config,
???_cache?=?self.cache;
??if(!_cache.isFlag)?{
???$('.js-max-input',parent).show();
???_cache.isFlag?=?true;
??}
??},
??/*
??*?隱藏?放大容器
??*?@method?hide
??*?{public}
??*/
??_hide:?function(parent)?{
??var?self?=?this,
???_config?=?self.config,
???_cache?=?self.cache;
??if(_cache.isFlag)?{
???$('.js-max-input',parent).hide();
???_cache.isFlag?=?false;
??}
??}
?};
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