This is the code for the TEMexpand function:
| Code Block |
|---|
function TEMconvertString(V){
if (!V) { return ''} else { return V.toString(); }
}
function TEMexpandLine(Tokens, Row, Array){
for (var i =0; i < Tokens.length-1; i+=2){
Array.push(Tokens[i]);
Array.push(TEMconvertString(Row[Tokens[i+1]])
.replaceAll("&", "&")
.replaceAll("<", "<")
.replaceAll(">", ">"))
}
Array.push(Tokens[Tokens.length-1]);
}
function TEMexpand(Data, Template){
var Array = [];
var Tokens = Template.replaceAll("$$", "_FuNkYDolARAM").split('$');
for (var i =0; i < Data.length; i++){
TEMexpandLine(Tokens, Data[i], Array);
}
return Array.join('').replaceAll("_FuNkYDolARAM", "$");
} |
What are the advantages compared to using a more fully featured templating system like Mustache?
The code does use some techniques which are worth understanding:
We use an array of strings and concatenate them at the end for performance.
We escape characters like & < and > to translate into HTML entities so that data can be not mis-interpreted and HTML markup.
We use a magic token '
_FuNkYDolARAM' to handle the convention of allows a double $$ escape sequence to represent a $ character.