Last position of a string

Question

I have the following code:

 var elements = document.getElementsByTagName('*');
for (var i = 0; i < elements.length; i++) {
     var txt = elements[i].innerHTML.replace('Estoque1', 'Estoque Vencido');
    }

It captures all page tags, and changes the word Stock to Expired Stock. I need to make a code that it erase anything below the word "Stock Past", after changing the word. In Case, if it were in Danish I would use the lastpos, now in Javascript I have no idea, someone can help me ?

Answer 1

You could use the function .slice() Javascript, then your code would look like this:

var elements = document.querySelectorAll('body *');
 for (var i = 0; i < elements.length; i++){
     var txt = elements[i].innerHTML;

     //Só dispara as alterações caso o conteúdo contenha a palavra "Estoque1"
     if(txt.indexOf('Estoque1') > -1){
         txt = txt.replace('Estoque1', 'Estoque Vencido');
         txt = txt.slice(0,15);
         elements[i].innerHTML = txt;
     }
 }

I also subistitui .getElementsByTagName() for .querySelectorAll() for better functioning.

Example: FIDDLE

Answer 2

With the use of regular expressions one can do this:

var txt = "Foo Bar Estoque1 Baz Poo Par Paz...";
txt = txt.replace(/Estoque1(.*)/, "Estoque Vencido");
// => Foo Bar Estoque Vencido

The function laspos(or LastDelimiter) may be considered equivalent to lastIndexOf() javascript.

var elementos = document.querySelectorAll('body *');
for (var indice = 0; indice < elementos.length; indice++)
{
   var txt = elementos[indice].innerHTML;
   var last = txt.lastIndexOf('Estoque1'); 
   if(txt.indexOf('Estoque1') > -1)
   {
      txt = txt.substring(0, last) + "Estoque Vencido" + txt.substring(last + txt.length);
      elementos[indice].innerHTML = txt;
   }
}

Fiddle