TransInterpolator

Combines

• Variable transposition ( via Transposer )
• Recursive string interpolation

import TransInterp from 'trans-interpolator';
 
const interp = new TransInterp({
    some: [
        { "!data!": '5000' }
    ]
});
 
interp.interpolate("Total: ${ some[0]['!data!'] }.");
// returns "Total: 5000."

It's also rescursive.

import math from 'mathjs' // http://mathjs.org
 
const interp = new TransInterp({
    price: 5000,
    expressions: {
        a: '${price}',                      // 5000
        b: '${expressions.a} * 1.5 / 2',    // 3750
        c: '${expressions.b} - ${getOne}',  // 3749
    },
    getOne: (value) => "( ${price} - ${price} ) + 1"
});
 
interp.interpolate("Computed to: ${ expressions.c }", (value) => {
    return math.eval(value);
});
// returns "Computed to: 3749"

It can be configured in two ways:

import TransInterp from 'trans-interpolator';
 
new TransInterp({ data: 1 }, {
    open: "!!!",
    close: "^^^",
    transform(value, dataKey, expression) {
        return ` :D ${value} :D `;
    }
});

or

import Base from 'trans-interpolator';
 
export class TransInterp extends Base {
    open = "<%"
    close = "%>"
    depth = 8
};
 
const transInterp = new TransInterp({})

API

class TransInterpolator([data], [[options]])

• data
  • The data to pull in; can contain expressions of itself.
  • When an expression resolves to a function, it will be treated just like a transform function.
• options
  • depth = 8 Limit the recursion depth.
  • open = "${" The open tag
  • close = "}" The end tag
  • transform(value, unresolved, expression) {}

method .interpolate([expression], [[transform]])

• expression {String}
• transform(value, unresolved, expression) { return value; }
  • Called when either no open tags are found or when the depth limit is met