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Consider plugin c is supported in recent versions of Node. What would be the best way to conditionally load it?

module.exports = {
  plugins: [   
    require("a"),
    require("b"),
    [require("c"), { default: false }] //only if node version > 0.11
  ]
};

Consider plugin c is supported in recent versions of Node. What would be the best way to conditionally load it?

module.exports = {
  plugins: [   
    require("a"),
    require("b"),
    [require("c"), { default: false }] //only if node version > 0.11
  ]
};

• javascript
• node.js

Share Improve this question Follow edited Dec 21, 2015 at 16:43 thedev asked Dec 21, 2015 at 16:41 thedevthedev 2,90688 gold badges3737 silver badges4747 bronze badges 2

• 1 thousands of ways to conditionally load it. what are your specific requirements? – Ryan Commented Dec 21, 2015 at 16:42
• @self "//only if node version > 0.11" – Sterling Archer Commented Dec 21, 2015 at 16:45

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 4

Make sure you add the semver package as a dependenc, then:

var semver = require("semver")
var plugins = [   
    require("a"),
    require("b"),
  ];

if(semver.gt(process.version, "0.11")){
    plugins.push(require("c"));
}

module.exports = {
  plugins: plugins
};

This code checks for the node version using process.version, and appends the required plugin to the list if it is supported.

If you want to make sure the major part of the version number is 0 and the minor part of the version number is greater than 11 you could use this

var sem_ver = process.version.replace(/[^0-9\.]/g, '').split('.');

if(parseInt(sem_ver[0], 10) == 0 && parseInt(sem_ver[1], 10) > 11)) {
    // load it

}

What you want to do is check the process object. According to the documentation, it will give you an object like so:

console.log(process.versions);

{ http_parser: '1.0',
  node: '0.10.4',
  v8: '3.14.5.8',
  ares: '1.9.0-DEV',
  uv: '0.10.3',
  zlib: '1.2.3',
  modules: '11',
  openssl: '1.0.1e' }

Then, simply process out the node property into a conditional if in your object.

You could use process.version:

var subver = parseFloat(process.version.replace(/v/, ''));

module.exports = {
  plugins: [   
    require("a"),
    require("b"),
    (subver > 0.11) [require("c"), { default: false }]
  ]
};

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