如何在node.js中导入文件？

Question

I have developed a node.js application and performing some validation with the use of a template. At the moment this 'template' is a local variable but I would like to store this in a file in my project. So this is the validation code:

isvalid(req.body,template
   , function(err, validObj) {
        if (!validObj) {
           validJson = false;
        }
});

the template variable looks like this:

var template={
       type: Object,
       "schema":
       {
          "totalRecords": {type:Number},
          "skip": {type:Number},
          "take": {type:Number}
       }
}

Suppose I have a file which contains the template contents how can I import this into my app?

Answer 1

You will need to change this line:

var template={

to this:

module.exports={

And then you can simply do:

var template = require('./path/to/template.js');

Note that this is a relative path to your file.

You need to set module.exports because that is the convention NodeJS uses to say "this is what will be returned if you require() this file.

Answer 2

var template = require('./template.json');

except that type: Object would need to be "type": "Object" (as a string), to conform to JSON standard (and, of course, without var template = , as Felix Kling correctly notes). If you actually want the Number etc. objects that actually exist in the JS object space, you would need to make it a proper Node module; require syntax stays the same.