querystring to json

Author: javascriptpopo

.gitignore

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+node_modules

index.js

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+{
+  "name": "querystring2json",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "directories": {
+    "example": "example"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "webpack": "^4.31.0",
+    "webpack-cli": "^3.3.2"
+  }
+}

package.json

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+let obj={ a: [ '1', '2' ], b: '2', c: '3',d:123,e:true };
+function stringify(obj){
+    let result="";
+    for(let key in obj){
+        if( typeof obj[key] !='object'){ //非对象值都转化为字符串
+            obj[key]=obj[key].toString();
+            result+=key+"="+obj[key]+"&"
+        }else if(obj[key] instanceof Array){ //是数组
+            obj[key].forEach(v=>{
+                result+=key+"="+v+"&"
+            })
+        }
+    }
+    return result.slice(0,-1);
+}
+console.log(stringify(obj));

src/json2qs.js

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+{
+  "devDependencies": {
+    "webpack": "^4.31.0",
+    "webpack-cli": "^3.3.2"
+  }
+}

src/package.json

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+/**
+ * querystring to json
+ * "a=1&a=2&b=2&c=3&d=123&e=true" to  { a: [ '1', '2' ], b: '2', c: '3', d: '123', e: 'true' }
+ */
+let str="a=1&a=2&b=2&c=3&d=123&e=true"
+function parse(str){
+    let result={};
+    let s1=str.split("&");
+    
+    s1.forEach((v,i)=>{
+        let res= v.split("=");
+        if(!result[res[0]]){ //key不存在
+            result[res[0]]=res[1];    
+        }else if(result[res[0]] instanceof Array){ //result key为数组
+            result[res[0]].push(res[1]);
+        }else{ //result key 已存在 且不为数组
+            result[res[0]]=[result[res[0]],res[1]]
+        }
+    })
+    return result;
+}
+console.log(parse(str));