在不了解JavaScript键的情况下Object
,我该如何打开类似...
var obj = {
param1: 'something',
param2: 'somethingelse',
param3: 'another'
}
obj[param4] = 'yetanother';
...进入...
var str = 'param1=something¶m2=somethingelse¶m3=another¶m4=yetanother';
...?
var str = "";
for (var key in obj) {
if (str != "") {
str += "&";
}
str += key + "=" + encodeURIComponent(obj[key]);
}
示例:http: //jsfiddle.net/WFPen/
如果您使用jQuery,这就是它用于参数化GET XHR请求的选项的方式:
$.param( obj )
http://api.jquery.com/jQuery.param/
一个优雅的例子:(假设您正在运行现代的浏览器或节点)
var str = Object.keys(obj).map(function(key) {
return key + '=' + obj[key];
}).join('&');
和ES2017等效:(感谢Lukas)
let str = Object.entries(obj).map(([key, val]) => `${key}=${val}`).join('&');
注意:encodeURIComponent()
如果键/值未经URL编码,则可能要使用。
一行没有依赖性:
new URLSearchParams(obj).toString();
// OUT: param1=something¶m2=somethingelse¶m3=another¶m4=yetanother
将其与内置的URL一起使用,如下所示:
let obj = { param1: 'something', param2: 'somethingelse', param3: 'another' }
obj['param4'] = 'yetanother';
const url = new URL(`your_url.com`);
url.search = new URLSearchParams(obj);
const response = await fetch(url);
[2020年4月4日编辑]:null
值将解释为字符串'null'
。
ES2017方法
Object.entries(obj).map(([key, val]) => `${key}=${val}`).join('&')
ES6:
function params(data) {
return Object.keys(data).map(key => `${key}=${encodeURIComponent(data[key])}`).join('&');
}
console.log(params({foo: 'bar'}));
console.log(params({foo: 'bar', baz: 'qux$'}));
深入一层...
var serialiseObject = function(obj) {
var pairs = [];
for (var prop in obj) {
if (!obj.hasOwnProperty(prop)) {
continue;
}
pairs.push(prop + '=' + obj[prop]);
}
return pairs.join('&');
}
有人在谈论对任意深对象的递归函数。
var serialiseObject = function(obj) {
var pairs = [];
for (var prop in obj) {
if (!obj.hasOwnProperty(prop)) {
continue;
}
if (Object.prototype.toString.call(obj[prop]) == '[object Object]') {
pairs.push(serialiseObject(obj[prop]));
continue;
}
pairs.push(prop + '=' + obj[prop]);
}
return pairs.join('&');
}
当然,这意味着在序列化过程中会丢失嵌套上下文。
如果这些值不是以URL编码开头的,而您打算在URL中使用它们,请查看JavaScript的encodeURIComponent()
。
Object.keys(obj).map(k => `${encodeURIComponent(k)}=${encodeURIComponent(obj[k])}`).join('&')
由于我对递归函数做了很多事情,因此这是我自己的版本。
function objectParametize(obj, delimeter, q) {
var str = new Array();
if (!delimeter) delimeter = '&';
for (var key in obj) {
switch (typeof obj[key]) {
case 'string':
case 'number':
str[str.length] = key + '=' + obj[key];
break;
case 'object':
str[str.length] = objectParametize(obj[key], delimeter);
}
}
return (q === true ? '?' : '') + str.join(delimeter);
}
http://jsfiddle.net/userdude/Kk3Lz/2/
仅作记录,如果您有支持ES6的浏览器,以下是一个解决方案reduce
:
Object.keys(obj).reduce((prev, key, i) => (
`${prev}${i!==0?'&':''}${key}=${obj[key]}`
), '');
这是一个正在运行的代码段!
// Just for test purposes
let obj = {param1: 12, param2: "test"};
// Actual solution
let result = Object.keys(obj).reduce((prev, key, i) => (
`${prev}${i!==0?'&':''}${key}=${obj[key]}`
), '');
// Run the snippet to show what happens!
console.log(result);
查询中包含数组时的有用代码:
var queryString = Object.keys(query).map(key => {
if (query[key].constructor === Array) {
var theArrSerialized = ''
for (let singleArrIndex of query[key]) {
theArrSerialized = theArrSerialized + key + '[]=' + singleArrIndex + '&'
}
return theArrSerialized
}
else {
return key + '=' + query[key] + '&'
}
}
).join('');
console.log('?' + queryString)
new URLSearchParams({hello: 'world', foo: 'bar' }).toString()
似乎可以胜任。不需要encodeURIComponent
。产出hello=world&foo=bar
如果您使用的是NodeJS 13.1或更高版本,则可以使用本机querystring模块来解析查询字符串。
const qs = require('querystring');
let str = qs.stringify(obj)
如果您需要一个递归函数,该函数将根据给定的对象生成正确的URL参数,请尝试使用我的Coffee-Script。
@toParams = (params) ->
pairs = []
do proc = (object=params, prefix=null) ->
for own key, value of object
if value instanceof Array
for el, i in value
proc(el, if prefix? then "#{prefix}[#{key}][]" else "#{key}[]")
else if value instanceof Object
if prefix?
prefix += "[#{key}]"
else
prefix = key
proc(value, prefix)
else
pairs.push(if prefix? then "#{prefix}[#{key}]=#{value}" else "#{key}=#{value}")
pairs.join('&')
或JavaScript已编译...
toParams = function(params) {
var pairs, proc;
pairs = [];
(proc = function(object, prefix) {
var el, i, key, value, _results;
if (object == null) object = params;
if (prefix == null) prefix = null;
_results = [];
for (key in object) {
if (!__hasProp.call(object, key)) continue;
value = object[key];
if (value instanceof Array) {
_results.push((function() {
var _len, _results2;
_results2 = [];
for (i = 0, _len = value.length; i < _len; i++) {
el = value[i];
_results2.push(proc(el, prefix != null ? "" + prefix + "[" + key + "][]" : "" + key + "[]"));
}
return _results2;
})());
} else if (value instanceof Object) {
if (prefix != null) {
prefix += "[" + key + "]";
} else {
prefix = key;
}
_results.push(proc(value, prefix));
} else {
_results.push(pairs.push(prefix != null ? "" + prefix + "[" + key + "]=" + value : "" + key + "=" + value));
}
}
return _results;
})();
return pairs.join('&');
};
这将构造如下字符串:
toParams({a: 'one', b: 'two', c: {x: 'eight', y: ['g','h','j'], z: {asdf: 'fdsa'}}})
"a=one&b=two&c[x]=eight&c[y][0]=g&c[y][1]=h&c[y][2]=j&c[y][z][asdf]=fdsa"
您可以使用jQuery的param
方法:
var obj = {
param1: 'something',
param2: 'somethingelse',
param3: 'another'
}
obj['param4'] = 'yetanother';
var str = jQuery.param(obj);
alert(str);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
var str = '';
for( var name in obj ) {
str += (name + '=' + obj[name] + '&');
}
str = str.slice(0,-1);
试一下。
示例: http ://jsfiddle.net/T2UWT/
一种功能方法。
var kvToParam = R.mapObjIndexed((val, key) => {
return '&' + key + '=' + encodeURIComponent(val);
});
var objToParams = R.compose(
R.replace(/^&/, '?'),
R.join(''),
R.values,
kvToParam
);
var o = {
username: 'sloughfeg9',
password: 'traveller'
};
console.log(objToParams(o));
<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.22.1/ramda.min.js"></script>
Object.toparams = function ObjecttoParams(obj)
{
var p = [];
for (var key in obj)
{
p.push(key + '=' + encodeURIComponent(obj[key]));
}
return p.join('&');
};
此方法使用递归下降到对象层次结构并生成rails样式参数,rails会将其解释为嵌入式哈希。objToParams生成一个末尾带有“&”号的查询字符串,而objToQuery删除最后一个“&”号。
function objToQuery(obj){
let str = objToParams(obj,'');
return str.slice(0, str.length);
}
function objToParams(obj, subobj){
let str = "";
for (let key in obj) {
if(typeof(obj[key]) === 'object') {
if(subobj){
str += objToParams(obj[key], `${subobj}[${key}]`);
} else {
str += objToParams(obj[key], `[${key}]`);
}
} else {
if(subobj){
str += `${key}${subobj}=${obj[key]}&`;
}else{
str += `${key}=${obj[key]}&`;
}
}
}
return str;
}
您可以使用npm lib查询字符串
const queryString = require('query-string');
querystring.stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' });
// Returns 'foo=bar&baz=qux&baz=quux&corge='
const obj = { id: 1, name: 'Neel' };
let str = '';
str = Object.entries(obj).map(([key, val]) => `${key}=${val}`).join('&');
console.log(str);
与Axios
和infinite depth
:
<pre>
<style>
textarea {
width: 80%;
margin-bottom: 20px;
}
label {
font-size: 18px;
font-weight: bold;
}
</style>
<label>URI</label>
<textarea id="uri" rows="7"></textarea>
<label>All Defaults (Bonus): </label>
<textarea id="defaults" rows="20"></textarea>
</pre>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script>
const instance = axios.create({
baseUrl: 'http://my-api-server',
url: '/user'
})
const uri = instance.getUri({
params: {
id: '1234',
favFruits: [
'banana',
'apple',
'strawberry'
],
carConfig: {
items: ['keys', 'laptop'],
type: 'sedan',
other: {
music: ['on', 'off', {
foo: 'bar'
}]
}
}
}
})
const defaults = JSON.stringify(instance.defaults, null, 2)
document.getElementById('uri').value = uri
document.getElementById('defaults').value = defaults
</script>
祝好运...
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