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JavaScript challenges web application

How To Install

Requires Node.js

Clone or download this repository.

Quickly get started from scratch by navigating to the repository folder and running;

npm install
npm start

Open a browser at localhost:8090

Adding Levels

If you want to add a level, send pull-request with it.

Each level is a .jsrl (jsrobot level) file. See /jsrl/test.jsrl file.

It is an xml-look-like file. Do not put a space characters before and after tag content, except the tag content is a function or part of javascript code.

Run npm install from root of the project for rebuilding levels. test.jsrl file is skipped while building. If you can suggest a better way of running level rebuild - please, create an issue.

It needs to have such parameters:

group - a group you want to add this level

name - level name

description - is a level description. In it you can use a <p></p> tag for paragraph, <span class='story'></span> for story and <span class='code'></span> for code blocks.

map.file - map file name.

map.mapcontent - map file content.

map.mapfunc - is a function that will run in a context of a map object. You can use it for colouring, for example.

runnerfunc - used to create more restrictions in level, for example, throw a custom error when user trying to use some variable etc.

before and after - javascript code that frames the user code. See an examples to find out what you can use in it. You are the javascript programmer, aren't you?

code - if you want, you can specify already written code in code field.

<description><p>Test description</p></description>
#   #
# _ #
#  f#
var f = function() {
    for(var i = 0; i<this.options.width; i++) {
        for (var j = 0; j<this.options.height; j++) {
            if(this.base[i][j].symbol === '#') {
                this.base[i][j].color = 'grey';
            } else if (/^\\d+$/.test(this.base[i][j].symbol)) {
                this.base[i][j].color = 'lime';
            } else if(this.base[i][j].symbol === 'f') {
                this.base[i][j].color = '#f0f0f0';
(function(code) {
    if(/steps|counter/.test(code)) {
        throw new Error('Robot: that would be very easy... You can do it without using steps or counter variables. By the way, do you know, that R is an object, and objects can have properties?.');
var counter = 0;
var steps=0;
    setInterval(function() {
        try {


            if( (steps === 4) &&
                (R.standingOn('1')) &&
                (counter<=2) )
            if((R.standingOn('2')) &&
        } catch(e) {
            error(e, intervals, R);

In map files you could use any symbols as a space symbol, except pre-defined in map.js:

'#': 'wall',
'$': 'wall',
' ': 'space',
'_': 'start',
'f': 'finish'
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