update: function()

in google-cloud-server/src/main/resources/buildServerResources/knockout.validation-2.0.3.js [1057:1092]

• 30 lines of code
• 15 McCabe index (conditional complexity)

	update: function (element, valueAccessor) {
		var obsv = valueAccessor(),
			config = kv.utils.getConfigOptions(element),
			val = unwrap(obsv),
			msg = null,
			isModified = false,
			isValid = false;

		if (obsv === null || typeof obsv === 'undefined') {
			throw new Error('Cannot bind validationMessage to undefined value. data-bind expression: ' +
				element.getAttribute('data-bind'));
		}

		isModified = obsv.isModified && obsv.isModified();
		isValid = obsv.isValid && obsv.isValid();

		var error = null;
		if (!config.messagesOnModified || isModified) {
			error = isValid ? null : obsv.error;
		}

		var isVisible = !config.messagesOnModified || isModified ? !isValid : false;
		var isCurrentlyVisible = element.style.display !== "none";

		if (config.allowHtmlMessages) {
			koUtils.setHtml(element, error);
		} else {
			ko.bindingHandlers.text.update(element, function () { return error; });
		}

		if (isCurrentlyVisible && !isVisible) {
			element.style.display = 'none';
		} else if (!isCurrentlyVisible && isVisible) {
			element.style.display = '';
		}
	}