jquery trigger change event

1$(selector).trigger("change");

1You can apply any one approach:
2
3$("#Input_Id").change(function(){   // 1st
4    // do your code here
5    // When your element is already rendered
6});
7
8
9$("#Input_Id").on('change', function(){    // 2nd (A)
10    // do your code here
11    // It will specifically called on change of your element
12});
13
14$("body").on('change', '#Input_Id', function(){    // 2nd (B)
15    // do your code here
16    // It will filter the element "Input_Id" from the "body" and apply "onChange effect" on it
17});

1$("input").trigger("click");

1$("input").change(function(){
2  alert("The text has been changed.");
3});

1$( "#foo" ).on( "click", function() {
2  alert( $( this ).text() );
3});
4$( "#foo" ).trigger( "click" );
5
6$( "#foo" ).on( "custom", function( event, param1, param2 ) {
7  alert( param1 + "\n" + param2 );
8});
9$( "#foo").trigger( "custom", [ "Custom", "Event" ] );

1$('#textareaID').bind('input propertychange', function() {
2
3      $("#yourBtnID").hide();
4
5      if(this.value.length){
6        $("#yourBtnID").show();
7      }
8});