Home > Article > Web Front-end > To import or not to import: Should you use braces for JavaScript imports?
Unpacking JavaScript Imports with Braces
When importing libraries in JavaScript, developers have two options: using braces to specify named imports or omitting braces to import only the default object. This article explores the key distinctions between these two methods.
Using Braces (e.g., Import React, { Component, PropTypes } from 'react';)
This syntax allows for selective importing of specific named exports from a given module. In the example provided, the default export React is imported under the same name, while the named exports Component and PropTypes are imported under their respective names.
Benefits of Using Braces:
Importing Without Braces (e.g., Import React, Component, PropTypes from 'react';)
This method imports all named exports as well as the default export. Variables with the same names as the imported entities are created in the local scope.
Drawbacks of Importing Without Braces:
General Guidelines:
In general, it is advisable to use braces when importing named exports selectively. This approach provides greater control, clarity, and code efficiency. However, if all named exports are required and name collisions are not a concern, importing without braces can be used for convenience.
Additional Note:
Ensure that the syntax used matches the export syntax in the imported module. For example, if the module exports default and named exports separately (e.g., export default React; export { Component, PropTypes }), using braces is necessary for selective named imports.
The above is the detailed content of To import or not to import: Should you use braces for JavaScript imports?. For more information, please follow other related articles on the PHP Chinese website!