How can check if a field is empty in a node template? I am using Drupal 8. I have a paragraphs field (field type: paragraphs of reference revisions) in node template, I tried lots of ways to check if the field is empty (purpose is to show the field only it has a value).

&lt;code&gt;
{# Below codes in node.html.twig #}
{# Below codes NOT work #}
  {% if content.field_notes.0 is empty %}
    This field is empty-1.
  {% endif %}

  {% if content.field_notes[0] is empty %}
    This field is empty-2.
  {% endif %}

  {# Enable module:twig field value #}
  {% if content.field_notes|field_value is empty %}
    This field is empty-3.
  {% endif %}

  {% if node.field_notes.isempty %}
    This field is empty-4.
  {% endif %}

  {% if node.field_notes.value is empty %}
    This field is empty-5.
  {% endif %}
&lt;/code&gt;


How can check if a paragraphs field is empty in node template in Drupal 8?

UPDATE:
Codes tested and result below, the way NOT work for paragraphs but work for some other field types.


{% set count_field_element_1 = node.field_paragraphs|length %}
  {{ count_field_element_1 }}
  {# when field has or no value: count_field_element_1 = 2 #}
  {# paragraphs type contains two field type: image and text plain long #}

{% set count_field_element_2 = node.field_image|length %}
  {{ count_field_element_2 }}
  {# when field has value: count_field_element_2 = 1; #}
  {# when field has no value: count_field_element_2 = 0; #}

{% set count_field_element_3 = node.field_text_plain_long|length %}
  {{ count_field_element_3 }}
  {# when field has value: count_field_element_3 = 1; #}
  {# when field has no value: count_field_element_3 = 0; #}


Maybe my question is not very clear, let me explain more as below:
The purpose of this question is to check if paragraphs field (not other field types) has a value. When a field value is input and saved, node page will show the field and its value; when no field value is input and saved, node page will NOT show the field (including the div element).


{% set count_field_element = node.field_paragraphs|length %}
  {{ count_field_element }}


count_field_element is 1 for below:


count_field_element is 0 for below(removing all form items of paragraphs in node form):


In short, up till now, I still NOT figure out a way to check if a paragraphs field has a value, node page will show paragraphs field empty only when removing all form items of paragraphs in node form.
Check on node.field_notes something like 



 {% set count_paragraph_element = node.field_notes | length %}
  {% if count_paragraph_element == 0 %}
      Empty
  {% else %}
      Not empty
  {% endif %}



Update
if you want to check if text plain long field has empty value try this.
I assume that your field machine name is field_text:



{% for item in node.field_notes %}
      {% if item.entity.field_text.value is empty %}
        text value is empty
      {% else %}
        text value not empty
      {% endif %}
{% endfor %}