If I want a specific element to be shown in a specific model. I will write the following xml:

<div t-if="widget.model == 'account.invoice'">
</div>

If I want to do the same thin jquery what should I do?

Actually I am trying to show a different placeholder image for the propduct.product model. for other models I want to show the same as the odoo is showing.

Odoo is setting the placeholder with the following code:

var FieldBinaryImage = FieldBinary.extend({
    template: 'FieldBinaryImage',
    placeholder: "/web/static/src/img/placeholder.png",
    render_value: function() {
        var url = this.placeholder;
        if(this.get('value')) {
            if(!utils.is_bin_size(this.get('value'))) {
                url = 'data:image/png;base64,' + this.get('value');
            } else {
                url = session.url('/web/image', {
                    model: this.view.dataset.model,
                    id: JSON.stringify(this.view.datarecord.id || null),
                    field: (this.options.preview_image)? this.options.preview_image : this.name,
                    unique: (this.view.datarecord.__last_update || '').replace(/[^0-9]/g, ''),
                });
            }
        }

How can I apply a condition to change the placeholder image for the specific model?