JQuery追加到变量元素

Question

I am building my own JS library backed by jquery. The constructor starts building on top of an existing div to flesh it out. In the library I am making an ajax call, so to this initial div I know how to append like (where this is the initial div passed in):

var t = this;
var sdiv = t.append("<ul class='foo'></ul>");

So now I need to loop through and append elements to the variable "sdiv". For some reason

$(sdiv).append("<li class='bar'>" + element[i] + "</li>");

isn't working/rendering. How do you append elements to other elements created as variables?

Thanks

Answer 1

It's not working because sdiv will be the same as the t variable, as append returns the originally selected element.

Instead, create the ul in it's own variable, then use that reference when appending. Try this:

var $t = $(this);
var $sdiv = $('<ul />', { class: 'foo' }).appendTo($t);

// in your loop...
$('<li />', { class: 'bar', text: element[i] }).appendTo($sdiv);

Note that I also wrapped this in a jQuery object. Assuming this code is being executed in an event handler, you would need to do that.

Answer 2

@RoryMcCrossan has provided a great answer. Another approach could be as follows:

var $t = $(this)
var $sdiv = $('<ul class="foo"/>');

Then in your loop do the following:

 $sdiv.append( $('<ul class="bar"/>').text( element[i] ) );

Then finally append $sdiv to $t :

 $t.append( $sdiv );

Answer 3

how to modify this script, so it doesn't delete the previous symbols when you click the wrong symbols ( letters for example), also how to make the "+" symbol to be allowed only once when you type it for "+61" and after that to be forbidden?

thank you again

 <script>
  $("#mobph").on('keyup', function(){
  var n = $(this).val().replace("+61", "0").replace(/[^+][^0-9]+/, "");
      //var n = $(this).val().replace(/[^0-9]+/g, "");//(/\D/g,'')   
        $(this).val(n.append(n).toLocaleString());
    //do something else as per updated question
    //myFunc(); //call another function too
    });
</script>