简单的javascript模板引擎

template.js

function templateEngine(tpl, data) {
    var reg    = /\{\{(?!\}\})(.*?)\}\}/g,
        regOut = /(^( )?(if|for|else|switch|case|break|{|}))(.*)?/g,
        code   = 'var r=[];\n',
        cursor = 0,
        match;

    var add = function(line, js) {
        js ? (code += line.match(regOut) ? line + '\n' : 'r.push(' + line + ');\n') :
            (code += line !== '' ? 'r.push("' + line.replace(/"/g, '\\"') + '");\n' : '');
        return add;
    };
    while (match = reg.exec(tpl)) {
        add(tpl.slice(cursor, match.index))(match[1], true);
        cursor = match.index + match[0].length;
    }
    add(tpl.substr(cursor, tpl.length - cursor));
    code += 'return r.join("");';

    return new Function(code.replace(/[\r\t\n]/g, '')).apply(data);
}