How to Hide button in the opportunity module menu with specific criteria (Sugar 7)?

Try this:

({
    extendsFrom: 'RecordView',
    render: function (options) {
        app.view.invokeParent(this, {type: 'view', name: 'record', method: 'render', args: [options]});

        var salesStage = this.model.get('sales_stage');

        if (salesStage != 'Verbal Conf') {
            $('a[name=test_form]').hide();
        }
    },
})

This way your code will execute after render instead of after initialization.

BTW, when you said it didn't work, what did work? Try putting a 'debugger;' comment before if (salesStage != 'Verbal Conf'){     - that way you can check whether salesStage is populated. If it is populated, then the problem is with your javascript, else your problem is with populating salesStage. Which is it?

This is work and sales stage get correct, bit I can not find link (***** form) from the page

render: function (options) {
        app.view.invokeParent(this, {type: 'view', name: 'record', method: 'render', args: [options]});

        var salesStage = this.model.get('sales_stage');
    alert(salesStage); // work good
        if (salesStage!=undefined && !(salesStage=='Verbal Conf' || salesStage=='VerbalConfSocial')) {     // work good
        alert('inner');            // work good
        if($('ul.dropdown-menu li span a[name=fusebilling_form]').length>0) alert('present'); // NOT find

         $('ul.dropdown-menu li span a[name=fusebilling_form]').parent.parent.hide(); // NOT find
        $('ul.dropdown-menu li span a[name=fusebilling_form]').hide(); // NOT find
        }
    },

Can You Help Me?

Ok, so I've discovered several things. Firstly, before you click on the dropdown arrow, it's not in the DOM, and therefore can't be hidden. Secondly, for some reason, jquery isn't working (probably a conflict) so I'd recommend raw JavaScript.

Try this:

({
    extendsFrom: 'RecordView',

    render: function (options) {
        app.view.invokeParent(this, {type: 'view', name: 'record', method: 'render', args: [options]});
        var salesStage = this.model.get('sales_stage');
        if (salesStage != 'Verbal Conf') {
            var test_form = this.getField('test_form');
            test_form.on("render", function(){test_form.$el[0].style.display = 'none';});
            test_form.render();
        }
    },
})

This works for the duplicate_button field (e.g. you replace your custom test_form with this.getField('duplicate_button').

This works by first getting the field. Then attaching a callback on rendering it that will set the display to none. Then it renders the event (so the callback fires).

Let me know how you get on with this.

It helped me very much, it works, thank you!

It helped me very much, it works, thank you!