express-modify-response

Example Usage

var expressModifyResponse = require('express-modify-response');
var app = ...
app.use(expressModifyResponse(
    (req, res) => {
        // return true if you want to modify the response later
        if (res.getHeader('Content-Type').startsWith('text/html')) return true;
        return false;
    (req, res, body) => {
        // body is a Buffer with the current response; return Buffer or string with the modified response
        // can also return a Promise.
        return body.toString() + '<script>console.log("hello");</script>';