visual composer front editor not working - wordpress

Question

Hi I'm using Word press visual composer .. the problem is that with some pages(not all pages) , the front editor is not working , it just keep loading endlessly ,at first it wasn't working with all pages .. but when I added a blank page , Front editor worked with the blank page and some other pages , so what to do to make visual composer front editor works with these pages?
I'm using word press the 7 theme.
this is my suffering:

Answer 1

There may be many reasons for this but the root is js error.
1. at first disable page "preloader" and try.
2. If not working try disabling other plugins for wordpress which may have js conflict.
3. The best way: Have a look on console log for js error in browser's developer tools and fix them.

Answer 2

i had problem with visual. In my case helped when i changed on classic mode and return to backend editor.

Answer 3

This issue is mostly related to composer-view.js, I faced the same issue and it got resolved after following this link -
visual-composer-templateget-is-not-a-functi and Visual Composer is not working
You need to replace old code of composer-view.js as follow. (ps:- backup your old file before replacing this code.)
You can find this file at following location-
wp-content/plugins/js_composer/assets/js/backend
Old Code
html2element: function ( html ) {
var attributes = {},
$template;
if ( _.isString( html ) ) {
this.template = _.template( html );
$template = $( this.template( this.model.toJSON(), vc.templateOptions.default ).trim() );
} else {
this.template = html;
$template = html;
}
_.each( $template.get( 0 ).attributes, function ( attr ) {
attributes[ attr.name ] = attr.value;
} );
this.$el.attr( attributes ).html( $template.html() );
this.setContent();
this.renderContent();
}
Replace with new one as follows-
html2element:function (html) {
var attributes = {},
$template;
if (_.isString(html)) {
this.template = _.template(html);
} else {
try {
this.template = _.template(html());
} catch (err) {
this.template = html;
}
}
$template = $(this.template(this.model.toJSON()).trim());
_.each($template.get(0).attributes, function (attr) {
attributes[attr.name] = attr.value;
});
this.$el.attr(attributes).html($template.html());
this.setContent();
this.renderContent();
}
then also replace the Render Function
Old code
render: function () {
var $shortcode_template_el = $( '#vc_shortcode-template-' + this.model.get( 'shortcode' ) );
if ( $shortcode_template_el.is( 'script' ) ) {
this.html2element( _.template( $shortcode_template_el.html(),
this.model.toJSON(),
vc.templateOptions.default ) );
} else {
var params = this.model.get( 'params' );
$.ajax( {
type: 'POST',
url: window.ajaxurl,
data: {
action: 'wpb_get_element_backend_html',
data_element: this.model.get( 'shortcode' ),
data_width: _.isUndefined( params.width ) ? '1/1' : params.width,
_vcnonce: window.vcAdminNonce
},
dataType: 'html',
context: this
} ).done( function ( html ) {
this.html2element( html );
} );
}
this.model.view = this;
this.$controls_buttons = this.$el.find( '.vc_controls > :first' );
return this;
}
Replace with new code as follows-
render: function () {
var $shortcode_template_el = $( '#vc_shortcode-template-' + this.model.get( 'shortcode' ) );
if ( $shortcode_template_el.is( 'script' ) ) {
var newHtmlCode = _.template( $shortcode_template_el.html(),
this.model.toJSON(),
vc.templateOptions.default );
if(!_.isString(newHtmlCode)){
newHtmlCode = $shortcode_template_el.html();
}
this.html2element( newHtmlCode );
} else {
var params = this.model.get( 'params' );
$.ajax( {
type: 'POST',
url: window.ajaxurl,
data: {
action: 'wpb_get_element_backend_html',
data_element: this.model.get( 'shortcode' ),
data_width: _.isUndefined( params.width ) ? '1/1' : params.width,
_vcnonce: window.vcAdminNonce
},
dataType: 'html',
context: this
} ).done( function ( html ) {
this.html2element( html );
} );
}
this.model.view = this;
this.$controls_buttons = this.$el.find( '.vc_controls > :first' );
return this;
}