stringify.js

  1. import isPlainObject from 'lodash.isplainobject';
  2. import isFunction from 'lodash.isfunction';
  3. import { default as isArray } from './is-array';
  4. function safe(fn) {
  5.     return function () {
  6.         var args = [];
  7.         for (var _i = 0; _i < arguments.length; _i++) {
  8.             args[_i] = arguments[_i];
  9.         }
  10.         try {
  11.             // tslib 不支持
  12.             // eslint-disable-next-line prefer-spread
  13.             return fn.apply(null, args);
  14.         }
  15.         catch (error) {
  16.             return args[0];
  17.         }
  18.     };
  19. }
  20. function stringifyPrimitive(v) {
  21.     if (typeof v === 'string')
  22.         return v;
  23.     if (typeof v === 'number' && isFinite(v))
  24.         return v;
  25.     if (typeof v === 'boolean')
  26.         return v ? 'true' : 'false';
  27.     if (typeof v === 'object')
  28.         return JSON.stringify(v);
  29.     return '';
  30. }
  31. /**
  32.  * 将对象转换成 query string
  33.  *
  34.  * @param {object} obj 需要序列化成 URL query string 的对象。属性值支持数组。
  35.  * @param {string} sep 用于界定键值对的子字符串。默认为 '&'
  36.  * @param {string} eq 用于界定 key 和 value 的子字符串。默认为 '='
  37.  * @param {object} options 自定义编码行为
  38.  * @param {function} options.encodeURIComponent 用于自定义的 encodeURIComponent
  39.  * @returns {string}
  40.  *
  41.  * @example
  42.  *
  43.  * stringify({})
  44.  * // => ''
  45.  *
  46.  * stringify({key: 'value', undef: undefined })
  47.  * // => 'key=value&undef='
  48.  */
  49. function stringify(obj, options) {
  50.     if (options === void 0) { options = {}; }
  51.     if (!isPlainObject(obj)) {
  52.         return '';
  53.     }
  54.     var _a = options || {}, _b = _a.sep, sep = _b === void 0 ? '&' : _b, _c = _a.eq, eq = _c === void 0 ? '=' : _c;
  55.     var encode = safe(encodeURIComponent);
  56.     if (options && isFunction(options.encodeURIComponent)) {
  57.         // @ts-ignore TODO:
  58.         encode = safe(options.encodeURIComponent);
  59.     }
  60.     var keys = Object.keys(obj);
  61.     var len = keys.length;
  62.     var fields = '';
  63.     for (var i = 0; i < len; i++) {
  64.         var k = keys[i];
  65.         var v = obj[k];
  66.         var ks = encode(stringifyPrimitive(k));
  67.         ks += eq;
  68.         if (isArray(v)) {
  69.             var vlen = v.length;
  70.             if (vlen === 0)
  71.                 continue;
  72.             for (var j = 0; j < vlen; j++) {
  73.                 fields += ks;
  74.                 fields += encode(stringifyPrimitive(v[j]));
  75.                 if (j < vlen - 1) {
  76.                     fields += sep;
  77.                 }
  78.             }
  79.         }
  80.         else {
  81.             fields += ks;
  82.             fields += encode(stringifyPrimitive(v));
  83.         }
  84.         if (i < len - 1) {
  85.             fields += sep;
  86.         }
  87.     }
  88.     return fields;
  89. }
  90. export default stringify;
  91. //# sourceMappingURL=stringify.js.map