Bracket NotationExpress structured data with bracket notation. Note: This feature not supported when using JSON Because JSON has its own way to express structured data. Object const form = new FormData() form.append('user[name]', 'John Doe') form.append('user[age]', '30') const params = new URLSearchParams() params.append('user[name]', 'John Doe') params.append('user[age]', '30') // is equivalent to const data = { user: { name: 'John Doe', age: '30' } } Array const form = new FormData() form.append('ids[]', '1') form.append('ids[]', '2') const params = new URLSearchParams() params.append('ids[]', '1') params.append('ids[]', '2') // is equivalent to const data = { ids: ['1', '2'] }Edit on GitHubPreviousOpenAPI GeneratorNextSmart Conversion