10 examples of 'textarea validation in jquery' in JavaScript

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function validate(container) {
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	var result = true,
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		_required = _validateRequired(container),
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		_widget = textArea.getWidget(true),
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		invalid,
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		candidates = (Widget.isOneOfMe(container, _widget) ? [container] : Widget.findDescendants(container, _widget));
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	if (candidates && candidates.length && (invalid = Array.prototype.filter.call(candidates, doContraintValidityTest))) {
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		result = (invalid.length === 0);
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	}
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	return result && _required;
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}

5
function checkTheTextarea(){
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  var textAreaText = false;
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  //Check textarea
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  var textArea = document.getElementById("contents"); //Get the text area
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  if(textArea) textAreaText = theTextareaIsNotEmpty(textArea.value);
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  //END Check textarea
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  //Check iFrame
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  var iFrame = document.getElementById("frame_contents");
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  if(iFrame&&iFrame.style.display=="inline"){
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    var innerDoc = iFrame.contentDocuments || iFrame.contentWindow.document;
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    if(innerDoc){
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      var frameTextArea = innerDoc.getElementById("selection_field");
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      textAreaText = theTextareaIsNotEmpty(frameTextArea.textContent||frameTextArea.innerText);
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    }
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  }
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  //END Check iFrame
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  //Toggle Submit button status
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  var formSubmitButton = document.getElementById("autoinstallationDetailsUpdateButton");
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  if(formSubmitButton){
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    if(textAreaText && formSubmitButton.disabled) formSubmitButton.disabled = false;
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    if(!textAreaText && !formSubmitButton.disabled) formSubmitButton.disabled = true;
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  }
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  checkTheTextareaTimer = setTimeout(function(){checkTheTextarea()}, 1200);
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}

87
function check_validation(element_id)
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{
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	if(!($(element_id).val()))
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	{
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		$(element_id).parent().parent().parent().addClass("errors");
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		$(element_id).parent().parent().parent().children('ul').show();
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		$("#errornote").show();
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		return true;
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	}
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	else
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		return false;
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}

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function validate(input) {
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  let valid = validatePresence(input);
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  // TODO change this to using classList
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  $(input).removeClass('error');
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  if (!valid) {
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    $(input).addClass('error');
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    return false;
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  }
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  if ($(input).data('validation-type') === 'monetary') {
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    valid = validateMonetaryValue(input);
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  }
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  if (!valid) {
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    $(input).addClass('error');
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    return false;
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  }
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  return true;
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}

86
function validate(form) {
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	if(jQuery("#access_id").val() == '') {
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		jQuery("#access_id").parent().parent().addClass('has-warning');
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		return false;
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	} else if(jQuery("#access_key").val() == '') {
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		jQuery("#access_key").parent().parent().addClass('has-warning');
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		return false;
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	} else if(jQuery("#bucket").val() == '') {
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		jQuery("#bucket").parent().parent().addClass('has-warning');
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		return false;
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	} else if(jQuery("#hostname").val() == '') {
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		jQuery("#hostname").parent().parent().addClass('has-warning');
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		return false;
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	}
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	return true;
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}

85
function validate(form) {
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	var i = 0;
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	jQuery("input.required").each(function() {
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		if(jQuery(this).val() == '') {
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			jQuery(this).focus();
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			return false;
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		}
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		i++;
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	});
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	if(i < jQuery("input.required").length) {
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		return false;
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	} else {
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		return true;
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	}
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}

100
function validate() {
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  var $this = $(this);
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  var $parentElem = $this.closest(".brz-form__item");
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  var value = $this.val();
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  var data = $this.data();
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  var type = data.type;
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  var result = true;
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  var isRequired = $this.prop("required");
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  var pattern = $this.attr("pattern");
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  $parentElem.removeClass(
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    "brz-form__item--error brz-form__item--error-pattern brz-form__item--error-required"
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  );
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  if (type === "Number") {
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    if (isRequired && !new RegExp(pattern).test(value)) {
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      $parentElem.addClass(
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        "brz-form__item--error brz-form__item--error-pattern"
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      );
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      result = false;
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    }
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  } else if (!new RegExp(pattern).test(value)) {
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    $parentElem.addClass(
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      "brz-form__item--error brz-form__item--error-pattern"
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    );
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    result = false;
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  }
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  if (isRequired && !value.length) {
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    $parentElem.addClass(
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      "brz-form__item--error brz-form__item--error-required"
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    );
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    result = false;
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  }
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  return result;
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}

32
function validateForm() {
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	var  user = document.forms["myForm"]["user"].value;
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	if(user.trim() == "") {
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		document.getElementById("userError").innerHTML = "Remplir le champ svp !";
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		return false;
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	}
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	return true;
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}

1
function validateForm(element) {
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	var result = true;
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	element.find('[required]').each(
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		function () {
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			var fieldElement = $(this);
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			//如果为null则设置为''
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			var value = editor.getValue() || '';
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			if (value) {
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				value = value.trim();
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			}
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			if (!value || value === fieldElement.attr('data-placeholder')) {
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				alert((fieldElement.attr('data-name') || this.name) + "不能为空！");
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				result = false;
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				return result;
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			}
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		}
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	);
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	return result;
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}

8
function validateForm(f)
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{
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    if ((!f.scm_integration[0].checked) && (!f.scm_integration[1].checked))  {
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        alert('{/literal}{t escape=js}Please choose whether the SCM integration feature should be enabled or not.{/t}{literal}');
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        return false;
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    }
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    if (f.scm_integration[0].checked) {
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        field = getFormElement(f, 'checkout_url');
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        if (isWhitespace(field.value)) {
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            alert('{/literal}{t escape=js}Please enter the checkout page URL for your SCM integration tool.{/t}{literal}');
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            selectField(f, 'checkout_url');
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            return false;
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        }
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        field = getFormElement(f, 'diff_url');
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        if (isWhitespace(field.value)) {
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            alert('{/literal}{t escape=js}Please enter the diff page URL for your SCM integration tool.{/t}{literal}');
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            selectField(f, 'diff_url');
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            return false;
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        }
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        field = getFormElement(f, 'scm_log_url');
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        if (isWhitespace(field.value)) {
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            alert('{/literal}{t escape=js}Please enter the log page URL for your SCM integration tool.{/t}{literal}');
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            selectField(f, 'scm_log_url');
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            return false;
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        }
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    }
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    return true;
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}