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Thread: [Javascript] [ES6] Bootstrap Form Builder

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    Super Moderator dday9's Avatar
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    [Javascript] [ES6] Bootstrap Form Builder

    Updated Code
    See post #2: https://www.vbforums.com/showthread....=1#post5537284

    Bootstrap Form Builder
    A simple JavaScript solution for building Bootstrap forms on the fly.

    Demo
    Fiddle: https://jsfiddle.net/ux84votz/

    Repository
    https://github.com/dday9/Bootstrap-Form-Builder

    Usage
    Code:
    const contactForm = formBuilder.buildForm({
      attributes: {
        enctype: 'application/x-www-form-urlencoded',
        method: 'post',
      },
      fieldsets: [
        {
          legend: 'Name',
          fields: [
            {
              attributes: {
                name: 'firstName',
                placeholder: 'John'
              },
              label: 'First Name'
            },
            {
              attributes: {
                name: 'lastName',
              placeholder: 'Doe'
              },
              label: 'Last Name'
            },
            {
              attributes: {
                name: 'email'
              },
              label: 'Email Address',
              type: 'email'
            }
          ]
        },
        {
          legend: 'Address',
          fields: [
            {
              attributes: {
                name: 'street1',
                placeholder: '123 Main St'
              },
              label: 'Street'
            },
            {
              attributes: {
                name: 'city',
                placeholder: 'Anytown'
              },
              label: 'City'
            },
            {
              attributes: {
                list: 'datalist-states',
                name: 'state'
              },
              datalist: {
                id: 'datalist-states',
                values: [ 'AK','AL','AR','AS','AZ','CA','CO','CT','DC','DE','FL','GA','GU','HI','IA','ID','IL','IN','KS','KY','LA','MA','MD','ME','MI','MN','MO','MS','MT','NC','ND','NE','NH','NJ','NM','NV','NY','OH','OK','OR','PA','PR','RI','SC','SD','TN','TX','UT','VA','VI','VT','WA','WI','WV','WY']
              },
              label: 'State',
            },
            {
              attributes: {
                name: 'zip',
                pattern: '\\d{5}',
                placeholder: '12345'
              },
              label: 'Zip Code',
              type: 'tel'
            }
          ]
        }
      ],
      submit: (e) => {
        e.preventDefault();
        console.log('submit');
      }
    });
    Source Code
    Code:
    const formBuilder = {};
    
    formBuilder.buildForm = (options) => {
      // validate the options parameter
      options = options || {};
      if (typeof options !== 'object' || options == null) {
        console.error('options is not a valid object');
        return null;
      }
    
      // validate the options.fieldsets parameter
      options.fieldsets = options.fieldsets || [];
      if (!Array.isArray(options.fieldsets)) {
        console.error('options.fieldset is not an array');
        return null;
      }
    
      // validate the options.attributes
      options.attributes = options.attributes || {};
      if (typeof options.attributes !== 'object' || options.attributes == null) {
        console.error('options.attributes is not a valid object');
        return null;
      }
    
      // create the form
      const form = document.createElement('form');
    
      // create a random id
      const rightNow = new Date();
      form.id = rightNow.getTime();
    
      // optionally bind to the submit event
      if (options.submit) {
        if ({}.toString.call(options.submit) !== '[object Function]') {
          console.error('options.submit is not a valid function');
          return;
        }
        // add the event listenter to document
        document.addEventListener('submit', (e) => {
          // check if the target is the form
          if (e.target && e.target.id === form.id) {
            // call the submit callback, passing e
            options.submit(e);
          }
        });
      }
    
      // iterate over every attribute to set the form attribute
      const attributes = Object.keys(options.attributes);
      attributes.forEach(attribute => {
        if (formBuilder.isValidFormAttribute(attribute)) {
          form.setAttribute(attribute, options.attributes[attribute]);
        } else {
          console.log(`'${attribute}' is an invalid form attribute.`);
        }
      });
    
      // iterate over every fieldset
      options.fieldsets.forEach(fieldset => {
        // create and append the fieldset to the form
        const fieldsetElement = formBuilder.buildFieldset(fieldset);
        if (fieldsetElement) {
          form.append(fieldsetElement);
        }
      });
    
      // return the form
      return form;
    };
    
    formBuilder.buildDatalist = (datalist) => {
      // validate the datalist parameter
      if (typeof datalist !== 'object' || datalist == null) {
        return null;
      }
    
      // require an id property
      if (!datalist.hasOwnProperty('id')) {
        console.error('datalist is missing the required property \'id\'');
        return null;
      }
    
      // require a values property
      if (!datalist.hasOwnProperty('values')) {
        console.error('datalist is missing the required property \'values\'');
        return null;
      }
    
      // require that the values property be an array
      if (!Array.isArray(datalist.values)) {
        console.error('datalist.values is not an array');
        return null;
      }
    
      // create the datalist
      const datalistElement = document.createElement('datalist');
      datalistElement.id = datalist.id;
    
      // iterate over the values to create an option with a value
      datalist.values.forEach(value => {
        const option = document.createElement('option');
        option.value = value;
        datalistElement.append(option);
      });
    
      // return the datalist
      return datalistElement;
    };
    
    formBuilder.buildFieldset = (fieldset) => {
      // validate the fieldset parameter
      if (typeof fieldset !== 'object' || fieldset == null) {
        console.error('fieldset is not a valid object');
        return null;
      }
    
      // validate the fieldset.fields parameter
      fieldset.fields = fieldset.fields || [];
      if (!Array.isArray(fieldset.fields)) {
        console.error('fieldset.fields is not an array');
        return null;
      }
    
      // create the element
      const fieldsetElement = document.createElement('fieldset');
    
      // optionally create a legend
      if (fieldset.legend) {
        if (Object.prototype.toString.call(fieldset.legend) !== "[object String]") {
          // validate the legend property
          console.log('fieldset.legend is not a string');
        } else {
          // create the legend element and append it to the fieldset
          const legend = document.createElement('legend');
          legend.innerHTML = fieldset.legend;
          fieldsetElement.append(legend);
        }
      }
    
      // iterate over each field
      fieldset.fields.forEach(field => {
        // create the div container
        const divContainer = document.createElement('div');
        divContainer.setAttribute('class', 'mb-3');
    
        // validate the field type or default to text
        const fieldType = (formBuilder.isValidFieldType(field) ? field.type : 'text');
    
        // optionally create the label
        if (field.label) {
          if (Object.prototype.toString.call(field.label) !== "[object String]") {
            // validate the legend property
            console.log('field.label is not a string');
          } else {
            // create the label and append it to the div container
            const label = formBuilder.buildLabel(field.label);
            if (label) {
              divContainer.append(label);
            }
          }
        }
    
        // create the input and append it to the div container
        const input = formBuilder.buildInput(field, fieldType);
        if (input) {
          divContainer.append(input);
        }
    
        // optionally create the datalist
        if (field.hasOwnProperty('datalist') && typeof field.datalist === 'object' && field.datalist !== null) {
          const datalist = formBuilder.buildDatalist(field.datalist);
          if (datalist) {
            divContainer.append(datalist);
          }
        }
    
        // append the div container
        fieldsetElement.append(divContainer);
      });
    
      // return the fieldset
      return fieldsetElement;
    };
    
    formBuilder.buildInput = (field, fieldType) => {
      // valdiate the field parameter
      if (typeof field !== 'object' || field == null) {
        return null;
      }
    
      // validate the fieldType parameter
      if (Object.prototype.toString.call(fieldType) !== "[object String]") {
        return null;
      }
    
      // create the input
      const input = document.createElement('input');
      input.setAttribute('type', fieldType);
    
      // iterate over each attribute to set the input attribute
      const attributes = Object.keys(field.attributes);
      attributes.forEach(attribute => {
        if (formBuilder.isValidInputAttribute(fieldType, attribute)) {
          input.setAttribute(attribute, field.attributes[attribute]);
        } else {
          console.log(`'${attribute}' is an invalid attribute for ${fieldType}.`);
        }
      });
      if (attributes.indexOf('class') < 0 || attributes.class.indexOf('form-control') < 0) {
        input.classList.add('form-control');
      }
    
      // return the input
      return input;
    };
    
    formBuilder.buildLabel = (label) => {
      // validate the label parameter
      if (Object.prototype.toString.call(label) !== "[object String]") {
        return null;
      }
    
      // create the label
      const labelElement = document.createElement('label');
      labelElement.setAttribute('class', 'form-label');
      labelElement.innerHTML = label;
    
      // return the label
      return labelElement;
    };
    
    formBuilder.isValidFieldType = (field) => {
      // validate the field parameter
      if (typeof field !== 'object' || field == null || !field.hasOwnProperty('type')) {
        return false;
      }
    
      // enumerate the acceptable types
      const acceptedTypes = [
        'checkbox',
        'color',
        'date',
        'datetime-local',
        'email',
        'file',
        'hidden',
        'month',
        'number',
        'password',
        'radio',
        'range',
        'search',
        'tel',
        'text',
        'time',
        'url',
        'week'
      ];
    
      // return if the field.type is one of the acceptable types
      return acceptedTypes.indexOf(field.type) > -1;
    };
    
    formBuilder.isValidFormAttribute = (attribute) => {
      if (Object.prototype.toString.call(attribute) !== "[object String]") {
        return false;
      }
      const attributes = [
        'accept',
        'accept-charset',
        'accesskey',
        'action',
        'autocapitalize',
        'autocomplete',
        'autofocus',
        'class',
        'contenteditable',
        'context-menu',
        'dir',
        'draggable',
        'enctype',
        'enterkeyhint',
        'exportparts',
        'hidden',
        'id',
        'inputmode',
        'is',
        'itemid',
        'itemprop',
        'itemref',
        'itemscope',
        'itemtype',
        'lang',
        'method',
        'name',
        'nonce',
        'novalidate',
        'part',
        'rel',
        'slot',
        'spellcheck',
        'style',
        'tabindex',
        'target',
        'title',
        'translate'
      ];
      if (attributes.indexOf(attribute) > -1) {
        return true;
      }
      if (attribute.indexOf('data-') > 0 && attribute.length > 5) {
        return true;
      }
    
      return false;
    };
    
    formBuilder.isValidInputAttribute = (type, attribute) => {
      if (Object.prototype.toString.call(attribute) !== "[object String]") {
        return false;
      }
      const allTypeAttributes = [
        'accesskey',
        'autocapitalize',
        'autocomplete',
        'autofocus',
        'class',
        'contenteditable',
        'context-menu',
        'dir',
        'disabled',
        'draggable',
        'enterkeyhint',
        'exportparts',
        'form',
        'hidden',
        'id',
        'inputmode',
        'is',
        'itemid',
        'itemprop',
        'itemref',
        'itemscope',
        'itemtype',
        'lang',
        'list',
        'name',
        'nonce',
        'part',
        'readonly',
        'required',
        'slot',
        'spellcheck',
        'style',
        'tabindex',
        'title',
        'translate',
        'value'
      ];
      if (allTypeAttributes.indexOf(attribute) > -1) {
        return true;
      }
      if (attribute.indexOf('data-') > 0 && attribute.length > 5) {
        return true;
      }
    
      if (type === 'checkbox') {
        const checkboxAttributes = [
          'checked'
        ];
        return checkboxAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'color') {
        const colorAttributes = [
          'list'
        ];
        return colorAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'date') {
        const dateAttributes = [
          'list',
          'max',
          'min',
          'readonly',
          'required',
          'step'
        ];
        return dateAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'datetime-local') {
        const datetimeLocalAttributes = [
          'list',
          'max',
          'min',
          'readonly',
          'required',
          'step'
        ];
        return datetimeLocalAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'email') {
        const emailAttributes = [
          'list',
          'readonly',
          'required'
        ];
        return emailAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'file') {
        const fileAttributes = [
          'accept',
          'capture',
          'multiple',
          'required'
        ];
        return fileAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'hidden') {
        return false;
      }
    
      if (type === 'month') {
        const monthAttributes = [
          'list',
          'max',
          'min',
          'readonly',
          'required',
          'step'
        ];
        return monthAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'number') {
        const numberAttributes = [
          'max',
          'min',
          'required',
          'step'
        ];
        return numberAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'password') {
        const passwordAttributes = [
          'maxlength',
          'minlength',
          'readonly',
          'required',
          'pattern',
          'placeholder',
          'size'
        ];
        return passwordAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'radio') {
        const radioAttributes = [
          'checked'
        ];
        return radioAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'range') {
        const rangeAttributes = [
          'list'
        ];
        return rangeAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'search') {
        const searchAttributes = [
          'dirname',
          'list',
          'maxlength',
          'minlength',
          'placeholder',
          'readonly',
          'required'
        ];
        return searchAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'tel') {
        const telAttributes = [
          'list',
          'maxlength',
          'minlength',
          'pattern',
          'placeholder',
          'readonly',
          'required',
          'size'
        ];
        return telAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'text') {
        const textAttributes = [
          'dirname',
          'list',
          'maxlength',
          'minlength',
          'pattern',
          'placeholder',
          'readonly',
          'required',
          'size'
        ];
        return textAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'time') {
        const timeAttributes = [
          'list',
          'max',
          'min',
          'readonly',
          'required',
          'step'
        ];
        return timeAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'url') {
        const timeAttributes = [
          'list',
          'maxlength',
          'minlength',
          'placeholder',
          'readonly',
          'required'
        ];
        return timeAttributes.indexOf(attribute) > -1;
      }
    
      if (type === 'week') {
        const weekAttributes = [
          'list',
          'max',
          'min',
          'readonly',
          'required',
          'step'
        ];
        return weekAttributes.indexOf(attribute) > -1;
      }
    
      return false;
    };
    Last edited by dday9; Sep 22nd, 2021 at 12:04 PM.
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