Object Spread vs. Object.assign(): When Should You Use Each in JavaScript?

Object Spread vs. Object.assign

In JavaScript, you can manipulate objects using various techniques, two common methods being the object spread operator and Object.assign().

Object Spread Syntax:

<code class="js">options = {...optionsDefault, ...options};</code>

Advantages:

• Conciseness: Allows for a more compact and readable syntax.
• Compile-friendly: When using a transpiler like Babel, it can be directly compiled without the need for a polyfill.

Disadvantages:

• Static: Only allows you to spread specific objects.
• ES2018 : Not supported in older JavaScript versions.

Object.assign() Method:

<code class="js">options = Object.assign({}, optionsDefault, options);</code>

Advantages:

• Standardized: Supported across browsers and JavaScript environments.
• Dynamic: Allows you to dynamically assign properties from multiple sources.
• Compatibility: Works with older JavaScript versions via polyfills.

Disadvantages:

• Verbosity: Requires more code to achieve the same outcome as object spread.
• Not Compile-friendly: Requires a polyfill when used in older environments without native support.

Use Cases:

If concise syntax and compilation compatibility are priorities, object spread is preferred. For maximum compatibility and flexibility, Object.assign() is a reliable option.

Example:

The commit you provided uses object-assign, a user-created module that mimics the functionality of Object.assign(). However, it appears to be bundled and compiled using Babel, allowing the use of object spread syntax without needing to import object-assign explicitly.

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