29 lines
909 B
Markdown
29 lines
909 B
Markdown
---
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title: objectToQueryString
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tags: utility,object,function,intermediate
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---
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Returns a query string generated from the key-value pairs of the given object.
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Use `Array.prototype.reduce()` on `Object.entries(queryParameters)` to create the query string.
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Determine the `symbol` to be either `?` or `&` based on the `index` and concatenate `val` to `queryString` only if it's a string.
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Return the `queryString` or an empty string when the `queryParameters` are falsy.
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```js
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const objectToQueryString = queryParameters => {
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return queryParameters
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? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {
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const symbol = index === 0 ? '?' : '&';
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queryString += (typeof val === 'string') ? `${symbol}${key}=${val}` : '';
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return queryString;
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}, '')
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: '';
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};
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```
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```js
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objectToQueryString({page: '1', size: '2kg', key: undefined}); // '?page=1&size=2kg'
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```
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