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Design Pattern

Builder

Build complex objects step by step with a fluent API.

creational

Visual Diagram

builder.select()
-> from()
-> where()
-> limit()
-> build()

When To Use

  • ->SQL query builders
  • ->HTTP request builders
  • ->Email composers
  • ->Complex configuration objects
Used in: Knex.js, Mongoose query API, request builders
builder.js

Live Editor

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Output

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