breeze.directives.js
function getIsRequired() {
            var info = this;
            if (info.isRequired !== undefined) { return info.isRequired; }

            // We don't know if it is required yet.
            // Once bound to the entity we can determine whether the data property is required
            // Note: Not bound until *second* call to the directive's link function
            //       which is why you MUST call 'getIsRequired'
            //       inside 'valErrsChanged' rather than in the link function
            var entityType = info.getType();
            if (entityType) { // the bound entity is known
                var requiredProperties =
                    getRequiredPropertiesForEntityType(entityType);

                return info.isRequired = !!requiredProperties[info.propertyPath];
            }
            return undefined; // don't know yet
        }
function getIsRequired() {
            var info = this;
            if (info.isRequired !== undefined) { return info.isRequired; }

            // We don't know if it is required yet.
            // Once bound to the entity we can determine whether the data property is required
            // Note: Not bound until *second* call to the directive's link function
            //       which is why you MUST call 'getIsRequired'
            //       inside 'valErrsChanged' rather than in the link function
            var entityType = info.getType();
            if (entityType) { // the bound entity is known
                var requiredProperties =
                    getRequiredPropertiesForEntityType(entityType);

                return info.isRequired = !!requiredProperties[info.propertyPath];
            }
            return undefined; // don't know yet
        }
function getIsRequired ( ) { var info = this ; if ( info . isRequired !== undefined ) { return info . isRequired ; } // We don't know if it is required yet. // Once bound to the entity we can determine whether the data property is required // Note: Not bound until *second* call to the directive's link function //       which is why you MUST call 'getIsRequired' //       inside 'valErrsChanged' rather than in the link function var entityType = info . getType ( ) ; if ( entityType ) { // the bound entity is known var requiredProperties = getRequiredPropertiesForEntityType ( entityType ) ; return info . isRequired = ! ! requiredProperties [ info . propertyPath ] ; } return undefined ; // don't know yet }
determine if bound property is required.
determine if bound property is required .