JS object to URL parameter (native JS and jquery two ways)

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Now the JS framework encapsulates the AJAX request very simply, such as the following:

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1. $.ajax ({  
2.          type: 
3.          url:  "some.php",   
4.          data: { name:  "John",  Location:  "Boston"  }  
5.      }). Done (function ( msg )  {  
6.          alert (  "data saved: "  +  msg );   
7.     });   

Above is a piece of Ajax request code based on the jquery framework, using the POST request method
But in some scenarios we still have to use get mode, and we need to spell out the request parameters, such as window.open, the a tag's href, and so on. Code such as this concatenation of strings is prone to errors, such as stitching all properties and values of an object into a URL's request parameter. We may need this:

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1. var params = ';
2. params + = ' key1= ' +obj.key1;
3. params + = ' key2= ' +obj.key2;
4. params + = ' key3= ' +obj.key3;
5. params + = ' key4= ' +obj.key4;
6. ...

Needless to say too much, painful ah, like hard labor, a little can not understand the programmer on the tall feeling. Maybe we can.

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1. var params = UrlEncode (obj);

In that case, how does this happen? Take a look at a buddy on the Internet implementation of jquery-based approach

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2. var parseparam=function (param, key) {
4. var paramstr="";
6. if (param instanceof string| | param instanceof number| | param instanceof Boolean) {
8. paramstr+="&" +key+ "=" +encodeuricomponent (param);
10. }else{
12. $.each (param,function (i) {
14. var k=key==null?i:key+ (param instanceof Array?" ["+i+"] ":". "  +i);
16. paramstr+=' & ' +parseparam (this, k);
18. });
20. }
22. return Paramstr.substr (1);
24. };

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1. Test
2. var obj={name:' Tom ',' class ': {className:' Class1 '},classmates:[{name:' Lily '}]};
3. ParseParam (obj);
4. Output: "Name=tom&class.classname=class1&classmates[0].name=lily"
5. ParseParam (obj,' Stu ');
6. Output: "Stu.name=tom&stu.class.classname=class1&stu.classmates[0].name=lily"

Reference from Liu Jiahua http://www.oschina.net/code/snippet_139242_7584


Since this code itself is not much, in order to enhance its versatility, I used native JavaScript to rewrite the method, as follows:

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2. /**
4. * Param the object that will be converted to the URL parameter string
6. * Key URL parameter string prefix
8. * Encode True/false is URL encoded, default is True
10. *
12. * Return URL parameter string
14. */
16. var UrlEncode = function (param, key, encode) {
18. if (param==null) return ';
20. var paramstr = ';
22. var t = typeof (param);
24. if (t = = ' string ' | | t = = ' number ' | | t = = ' Boolean ') {
26. Paramstr + = ' & ' + key + ' = ' + ((encode==null| | Encode)?  encodeURIComponent (param): param);
28. } Else {
30. For (var i in param) {
32. var k = key = = null? I:key + (param instanceof Array?)  ' [' + i + '] ': ' . ' + i);
34. Paramstr + = UrlEncode (Param[i], k, encode);
36. }
38. }
40. return paramstr;
42. };
48. var obj={name:' Tom ',' class ': {className:' Class1 '},classmates:[{name:' Lily '}]};
50. Console.log (UrlEncode (obj));
52. Output: &name=tom&class.classname=class1&classmates[0].name=lily
54. Console.log (UrlEncode (obj,' Stu '));
56. Output: &stu.name=tom&stu.class.classname=class1&stu.classmates[0].name=lily

JS object to URL parameter (native JS and jquery two ways)