Implementing advanced search functions similar to Baidu Academic based on JavaScript_javascript skills

Baidu Academichttp://xueshu.baidu.com/Advanced retrieval is achieved through the front-end generating internal advanced grammar in the back-end. It can be implemented through string splicing in the front-end js and passed to the back-end. Not too difficult:

The following is the core function code of advanced search. I use pure js implementation and do not use jquery:

<p class="fl srh-btn">
<input type="submit" class="srh-submit" style="height:px" value="高级搜索" id="highSearchObj"/>
</p> 
//省略部分调用关系
this.highSearch = function () {
document.getElementById('highSearchObj').disabled=true; 
var highSearchHtml = '<div class="highSearch" style="display:block"><div class="highMsg"><ul> \
<li><span id="tabReg" class="tab">包含关键词</span><input id="kywds" value=""></li> \
<li><span id="tabReg" class="tab">不包含关键词</span><input id="nokywds" value=""></li>\
<li><span id="tabReg" class="tab">检索范围</span>\
<select id="st">\
<option value ="byrw">本院认为</option>\
<option value ="sljg">审理经过</option>\
<option value="ygsc">原告诉称</option>\
<option value="bgbc">被告辩称</option>\
</select></li>\
</ul>\
<input id="conditionObj" type="submit" value="新增一组条件"></input>\
<hr>\
<div class="fit">\
<select id="type">\
<option value ="all">全部</option>\
<option value ="pj">判决</option>\
<option value ="cd">裁定</option>\
<option value="tz">通知</option>\
<option value="jd">决定</option>\
<option value="tj">调解</option>\
</select><select id="round">\
<option value ="all">全部</option>\
<option value ="one">一审</option>\
<option value ="two">二审</option>\
<option value="again">再审</option>\
</select>\
<input id="bg" value="">-<input id="end" value="">\
<ul><li><span id="tabReg" class="tab">案由</span><input id="ay" value=""></input></li>\
<li><span id="tabReg" class="tab">法院</span><input id="fy" value=""></input></li>\
</ul></div>\
<ul id="sql"></ul>\
<input id="submitHighSearchObj" type="submit" value="提交高级搜索"></input>\
</div></div>';
this.highSearchObj = $(highSearchHtml);
$("body").append(this.highSearchObj);
$("#conditionObj").click(function(){
var kywds="\""+document.getElementById("kywds").value.split(" ").join("\"&\"")+"\"";
var st=document.getElementById("st").value;
var nokywds="\""+document.getElementById("nokywds").value.split(" ").join("\"|\"")+"\"";
var sql="<li name=\"highTag\">@("+st+")("+kywds+"-"+nokywds+")</li>";
$("#sql").append(sql);
})
$("#submitHighSearchObj").click(function(){
var highTags=document.getElementsByName("highTag");
var tags="";
var filters="";
var round=document.getElementById("round").value;
var type=document.getElementById("type").value;
var reason=document.getElementById("ay").value.split(" ").join(",");
var court=document.getElementById("fy").value.split(" ").join(",");
var begin=document.getElementById("bg").value;
var end=document.getElementById("end").value;
if(highTags.length==){
var kywds="\""+document.getElementById("kywds").value.split(" ").join("\"&\"")+"\"";
var st=document.getElementById("st").value;
var nokywds="\""+document.getElementById("nokywds").value.split(" ").join("\"|\"")+"\"";
tags="@("+st+")("+kywds+"-"+nokywds+")"; 
} else {
for(i=;i<highTags.length;i++){
tags+=highTags[i].innerHTML;
} 
}
if(round !="all") {
filters+=" round:"+round+";";
}
if(type !="all") {
filters+=" type:"+type+";";
}
if(reason !="") {
filters+=" reason:"+reason+";";
}
if(court !="") {
filters+=" court:"+court+";";
}
if(begin !="" && end !="") {
filters+=" year:";
while(begin<=end) {
filters=filters+begin+",";
begin++;
}
}
if(filters !="") {
tags="magic:"+tags+";filter:"+filters;
}
var formObj = $('<form id="form" action="/search" target="_self" method="get"></form>');
var html = ['<input type="hidden" name="type" value="">'];
html.push('<input type="hidden" name="keyword" value="' + encodeURIComponent(tags) + '">');
html.push('<input type="hidden" name="TypeKey" value="' + encodeURIComponent(tags) +'">');
formObj.html(html.join(","));
$("body").append(formObj);
formObj.submit();
});
// $("#ay").keyup(function(e){
// });
}

Lines 3 to 36 are mainly the HTML code of the pop-up window.

Lines 37 and 38 use the simplest method commonly used in js to dynamically modify the frontend in the page.

Lines 39 and 46 are both action processing of the new code, used to submit conditions and sub-conditions.

In the function on line 46, string splicing is done.

In lines 88 to 96, the js+html call for submitting query conditions through a hidden form is implemented.

jquery js implements search condition switching in advanced conditional search function

Basic idea:

1.HTML:

Use table to display all search conditions, use input control to display each search condition, and define two CSS class styles to distinguish the selected and unselected status of the search conditions

2.JS implementation:

Binding click events for unselected inputs can be achieved by binding unselected style classes, code implementation

function (event) {//event为点击事件
$(event.target).parent().find( '.条件input-selected' ).toggleClass('条件input-selected' ).toggleClass( '条件input-default');
$(event.target).toggleClass( '条件input-selected' ).toggleClass('条件input-default' );
},

At this point, automatic switching of all search conditions is achieved