tpl.js

function compile(template){
    var evalExpr = /<%=(.+?)%>/g;
    var expr = /<%([\s\S]+?)%>/g;

    template = template
        .replace(evalExpr, '`);\n echo( $1 );\n echo(`')
        .replace(expr, '`);\n $1 \n echo(`');
    template = 'echo(` ' + template + '`);';

    var script = `
    (function parse(data){
        var output = "";
        function echo(html){
            output += html;
        }
        ${ template }
        return output;
    })`;
    return script;
}
function tokenize(TOKEN_REGEX, str) {
    let result = [];
    let match;
    while(match = TOKEN_REGEX.exec(str)){
        result.push(match[1]);
    }
    return result;
}

module.exports = { compile, tokenize };

use-case.js

node> const { compile } = require('./tpl');
node> var template = `
<ul>
  <% for(var i=0; i < data.supplies.length; i++) { %>
    <li><%= data.supplies[i] %></li>
  <% } %>
</ul>
`;
node> var parse = eval(compile(template));
node> let data = { supplies: ['apple', 'banana', 'orange']};
node> parse(data)

node> const { tokenize } = require('./tpl');
node> const Y_TOKEN = /\s*(\+|\-|\*|\/|[0-9])+\s*/y;
node> tokenize(Y_TOKEN," 2 + 3 - 4 * 5 / 8 " )