{"id":1180,"date":"2023-09-19T07:35:51","date_gmt":"2023-09-19T05:35:51","guid":{"rendered":"https:\/\/epicmarketing.co.il\/notebook\/?p=1180"},"modified":"2023-09-19T07:35:57","modified_gmt":"2023-09-19T05:35:57","slug":"forms-custom-validation","status":"publish","type":"post","link":"https:\/\/epicmarketing.co.il\/notebook\/forms-custom-validation\/","title":{"rendered":"Forms custom validation"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u05db\u05e9\u05e2\u05d5\u05e9\u05d9\u05dd \u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05dc\u05e9\u05d3\u05d4 \u05d1\u05d8\u05d5\u05e4\u05e1 \u05de\u05e7\u05d1\u05dc\u05d9\u05dd \u05e7\u05d5\u05d3 \u05e9\u05d0\u05d5\u05de\u05e8 \u05d4\u05d0\u05dd \u05d4\u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05e2\u05d1\u05e8\u05d4 \u05d0\u05d5 \u05e0\u05db\u05e9\u05dc\u05d4. \u05d4\u05e7\u05d5\u05d3 \u05d4\u05d6\u05d4 \u05e0\u05de\u05e6\u05d0 \u05d1\u05ea\u05d5\u05da fieldName.errors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u05db\u05dc \u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05d4\u05d9\u05d0 \u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 \u05e9\u05de\u05e7\u05d1\u05dc\u05ea&nbsp;<code>control: AbstractControl<\/code>&nbsp;\u05d5\u05de\u05d7\u05d6\u05d9\u05e8\u05d4&nbsp;<code>ValidationErrors | null<\/code>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u05e0\u05e0\u05d9\u05d7 \u05e9\u05d0\u05e0\u05d7\u05e0\u05d5 \u05e8\u05d5\u05e6\u05d9\u05dd \u05dc\u05e2\u05e9\u05d5\u05ea \u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05dc\u05e9\u05dd \u05de\u05e9\u05ea\u05de\u05e9 \u05db\u05da \u05e9\u05d4\u05d5\u05d0 \u05de\u05d7\u05e8\u05d5\u05d6\u05ea \u05dc\u05dc\u05d0 \u05e8\u05d5\u05d5\u05d7\u05d9\u05dd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u05d1\u05ea\u05d5\u05da \u05d4\u05e7\u05d5\u05de\u05e4\u05d5\u05e0\u05e0\u05d8\u05d4 \u05e0\u05e9\u05d9\u05dd \u05d0\u05ea \u05d4\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 \u05e9\u05dc \u05d4\u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nnoSpaceAllowed(control: FormControl){\n    const value = control.value;\n\n    if(value != null &amp;&amp; value.indexOf(&#039; &#039;) != -1){\n      return {noSpaceAllowed: true}\n    }\n    return null;\n}\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05d1\u05d4\u05d2\u05d3\u05e8\u05ea \u05e9\u05d3\u05d5\u05ea \u05d4\u05d8\u05d5\u05e4\u05e1, \u05e0\u05d7\u05d1\u05e8 \u05d0\u05ea \u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05ea \u05d4\u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nfirstName: &#x5B;&#039;&#039;, &#x5B;Validators.required, this.noSpaceAllowed]],\n\nget firstName() {\n    return this.contactForm.get(&#039;presonalDetails.firstName&#039;);\n}\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05d1\u05d8\u05de\u05e4\u05dc\u05d8 \u05e0\u05e9\u05ea\u05de\u05e9 \u05d1\u05e9\u05d3\u05d4 \u05e9\u05d4\u05d2\u05d3\u05e8\u05e0\u05d5 \u05d5\u05e0\u05d1\u05d3\u05d5\u05e7 \u05d0\u05ea \u05d4\u05e2\u05e8\u05da \u05e9\u05d4\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 \u05d4\u05d7\u05d6\u05d9\u05e8\u05d4 \u05e2\u05dc \u05de\u05e0\u05ea \u05dc\u05d0\u05ea\u05e8 \u05e9\u05d2\u05d9\u05d0\u05d5\u05ea.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.html<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: xml; title: ; notranslate\" title=\"\">\n&lt;span *ngIf=&quot;firstName?.errors?.&#x5B;&#039;noSpaceAllowed&#039;]&quot;&gt;First name is required&lt;\/span&gt;\n<\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">Async validator<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u05d0\u05e0\u05d7\u05e0\u05d5 \u05e6\u05e8\u05d9\u05db\u05d9\u05dd Async validator \u05db\u05e9\u05e9\u05d5\u05dc\u05d7\u05d9\u05dd http request. \u05d5\u05dc\u05d9\u05d3\u05d8\u05d5\u05e8 \u05d0\u05e1\u05d9\u05e0\u05db\u05e8\u05d5\u05e0\u05d9 \u05de\u05d7\u05d6\u05d9\u05e8 promise \u05d0\u05d5 observable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u05e0\u05e0\u05d9\u05d7 \u05e9\u05d0\u05e0\u05d7\u05e0\u05d5 \u05e8\u05d5\u05e6\u05d9\u05dd \u05dc\u05e7\u05d1\u05dc \u05de\u05d9\u05d9\u05dc\u05d9\u05dd \u05e8\u05e7 \u05e2\u05dd \u05e1\u05d9\u05d5\u05de\u05ea \u05de\u05e1\u05d5\u05d9\u05d9\u05de\u05ea \u05d5\u05d9\u05e9 \u05dc\u05e0\u05d5 \u05d1-DB \u05e8\u05e9\u05d9\u05de\u05d4 \u05e9\u05dc \u05de\u05d9\u05d9\u05dc\u05d9\u05dd \u05de\u05d5\u05ea\u05e8\u05d9\u05dd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u05e0\u05d2\u05d3\u05d9\u05e8 \u05d0\u05ea \u05d4\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 \u05e9\u05dc \u05d4\u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05d1\u05ea\u05d5\u05da \u05e7\u05d5\u05d1\u05e5 \u05d4-class.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nemailNotAllowed(control: FormControl): Promise&lt;any&gt; | Observable&lt;any&gt; {\n    const response = new Promise((resolve, reject) =&gt; {\n      \/\/ Timer to assimulate async action\n      setTimeout(() =&gt; {\n        if (control.value !== &#039;service@taxes.gov.il&#039;) {\n          resolve({ emailNotAllowed: true });\n        } else {\n          resolve(null);\n        }\n      }, 5000);\n    });\n    return response;\n}\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05d4\u05e7\u05e8\u05d9\u05d0\u05d4 \u05dc\u05d5\u05dc\u05d9\u05d3\u05d8\u05d5\u05e8 \u05ea\u05d4\u05d9\u05d4 \u05d1\u05e8\u05e9\u05d9\u05de\u05d4 \u05e0\u05e4\u05e8\u05d3\u05ea \u05de\u05d6\u05d5 \u05e9\u05dc \u05d4\u05d5\u05dc\u05d9\u05d3\u05d8\u05d5\u05e8\u05d9\u05dd \u05d4\u05e8\u05d2\u05d9\u05dc\u05d9\u05dd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nemail: &#x5B;&#039;&#039;, &#x5B;Validators.required, Validators.email], this.emailNotAllowed]\n<\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">Value &amp; status change events<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u05d0\u05d9\u05e8\u05d5\u05e2 ValueChange \u05d9\u05e7\u05e8\u05d4 \u05d0\u05dd \u05d9\u05d4\u05d9\u05d4 \u05e9\u05d9\u05e0\u05d5\u05d9 \u05d1\u05e2\u05e8\u05da \u05e9\u05dc FormCOntrol, FormGroup \u05d0\u05d5 FormArray. \u05d0\u05e0\u05d7\u05e0\u05d5 \u05e0\u05e8\u05e9\u05de\u05d9\u05dd \u05dc\u05e7\u05d1\u05dc \u05d0\u05ea \u05d4\u05e9\u05d9\u05e0\u05d5\u05d9\u05d9\u05dd \u05d1\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 OnInit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nthis.contactForm.get(&#039;message&#039;)?.valueChanges.subscribe(value =&gt; {\n      console.log(value);\n})\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05d0\u05e4\u05e9\u05e8 \u05d2\u05dd \u05dc\u05d4\u05d0\u05d6\u05d9\u05df \u05dc\u05e9\u05d9\u05e0\u05d5\u05d9\u05d9\u05dd \u05e9\u05d9\u05e9 \u05d1-form \u05e2\u05e6\u05de\u05d5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nthis.contactForm.valueChanges.subscribe(value =&gt; {\n      console.log(value);\n})\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05dc\u05db\u05dc form control \u05d9\u05e9 \u05e1\u05d8\u05d8\u05d5\u05e1. \u05d0\u05dd \u05e9\u05d3\u05d4 \u05d0\u05d7\u05d3 \u05d4\u05d5\u05d0 invalid, \u05db\u05dc \u05d4\u05d8\u05d5\u05e4\u05e1 \u05d9\u05d4\u05d9\u05d4 invalid. \u05db\u05e9\u05d9\u05e9 \u05d1\u05d3\u05d9\u05e7\u05d4 \u05e9\u05dc \u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4, \u05d4\u05d0\u05d9\u05e8\u05d5\u05e2 StatusChanges \u05e2\u05d5\u05dc\u05d4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u05d0\u05e4\u05e9\u05e8 \u05dc\u05d7\u05d1\u05e8 \u05d0\u05ea \u05d4\u05e2\u05e8\u05db\u05d9\u05dd \u05e9\u05de\u05e7\u05d1\u05dc\u05d9\u05dd \u05dc\u05de\u05e9\u05ea\u05e0\u05d9\u05dd \u05d1-class \u05d5\u05dc\u05d4\u05e9\u05ea\u05de\u05e9 \u05d1\u05d4\u05dd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nthis.contactForm.statusChanges.subscribe(value =&gt; {\n      console.log(value);\n})\n<\/pre><\/div>\n\n\n<h2 class=\"wp-block-heading\">Setting values to the form<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u05d0\u05e4\u05e9\u05e8 \u05dc\u05d7\u05d1\u05e8 \u05e2\u05e8\u05db\u05d9\u05dd \u05dc\u05e9\u05d3\u05d5\u05ea \u05e9\u05dc \u05d4\u05d8\u05d5\u05e4\u05e1. \u05d4\u05de\u05d1\u05e0\u05d4 \u05e9\u05dc \u05d4\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 \u05d7\u05d9\u05d9\u05d1 \u05dc\u05d4\u05ea\u05d0\u05d9\u05dd \u05dc\u05de\u05d1\u05e0\u05d4 \u05e9\u05dc \u05d4\u05d8\u05d5\u05e4\u05e1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nthis.contactForm = this.formBuilder.group({\n      presonalDetails: this.formBuilder.group({\n        firstName: &#x5B;&#039;&#039;, &#x5B;Validators.required, this.noSpaceAllowed]],\n        lastName: &#039;&#039;,\n        email: &#x5B;&#039;&#039;, &#x5B;Validators.required, Validators.email], this.emailNotAllowed,],\n      }),\n      message: &#039;&#039;,\n      subjects: new FormArray(&#x5B;new FormControl(null)]),\n});\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05e9\u05d9\u05de\u05d5\u05e9 \u05d1\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4\u00a0<code>setValue<\/code>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nthis.contactForm.setValue({\n      presonalDetails: {\n        firstName: &#039;&#039;,\n        lastName: &#039;&#039;,\n        email: &#039;&#039;\n      },\n      message: &#039;&#039;,\n      subjects: &#x5B;]\n})\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05e9\u05d9\u05de\u05d5\u05e9 \u05d1\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4\u00a0<code>patchValue<\/code>\u00a0\u05dc\u05d4\u05e9\u05de\u05d4 \u05d7\u05dc\u05e7\u05d9\u05ea \u05e9\u05dc \u05d4\u05e2\u05e8\u05db\u05d9\u05dd:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nthis.contactForm.patchValue({\n    personalDetails: {\n      firstName: &#039;&#039;\n    }\n})\n<\/pre><\/div>\n\n\n<p class=\"wp-block-paragraph\">\u05d0\u05e4\u05e9\u05e8 \u05dc\u05d0\u05e4\u05e1 \u05d8\u05d5\u05e4\u05e1:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>comp.ts<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: jscript; title: ; notranslate\" title=\"\">\nthis.contactForm.reset({\n    presonalDetails: {\n      firstName: &#039;&#039;,\n      lastName: &#039;&#039;,\n      email: &#039;&#039;\n    },\n    message: &#039;Write your message&#039;,\n    subjects: &#x5B;]\n})\n<\/pre><\/div>","protected":false},"excerpt":{"rendered":"<p>\u05db\u05e9\u05e2\u05d5\u05e9\u05d9\u05dd \u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05dc\u05e9\u05d3\u05d4 \u05d1\u05d8\u05d5\u05e4\u05e1 \u05de\u05e7\u05d1\u05dc\u05d9\u05dd \u05e7\u05d5\u05d3 \u05e9\u05d0\u05d5\u05de\u05e8 \u05d4\u05d0\u05dd \u05d4\u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05e2\u05d1\u05e8\u05d4 \u05d0\u05d5 \u05e0\u05db\u05e9\u05dc\u05d4. \u05d4\u05e7\u05d5\u05d3 \u05d4\u05d6\u05d4 \u05e0\u05de\u05e6\u05d0 \u05d1\u05ea\u05d5\u05da fieldName.errors. \u05db\u05dc \u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05d4\u05d9\u05d0 \u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 \u05e9\u05de\u05e7\u05d1\u05dc\u05ea&nbsp;control: AbstractControl&nbsp;\u05d5\u05de\u05d7\u05d6\u05d9\u05e8\u05d4&nbsp;ValidationErrors | null. \u05e0\u05e0\u05d9\u05d7 \u05e9\u05d0\u05e0\u05d7\u05e0\u05d5 \u05e8\u05d5\u05e6\u05d9\u05dd \u05dc\u05e2\u05e9\u05d5\u05ea \u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4 \u05dc\u05e9\u05dd \u05de\u05e9\u05ea\u05de\u05e9 \u05db\u05da \u05e9\u05d4\u05d5\u05d0 \u05de\u05d7\u05e8\u05d5\u05d6\u05ea \u05dc\u05dc\u05d0 \u05e8\u05d5\u05d5\u05d7\u05d9\u05dd. \u05d1\u05ea\u05d5\u05da \u05d4\u05e7\u05d5\u05de\u05e4\u05d5\u05e0\u05e0\u05d8\u05d4 \u05e0\u05e9\u05d9\u05dd \u05d0\u05ea \u05d4\u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05d4 \u05e9\u05dc \u05d4\u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4. comp.ts \u05d1\u05d4\u05d2\u05d3\u05e8\u05ea \u05e9\u05d3\u05d5\u05ea \u05d4\u05d8\u05d5\u05e4\u05e1, \u05e0\u05d7\u05d1\u05e8 \u05d0\u05ea \u05e4\u05d5\u05e0\u05e7\u05e6\u05d9\u05ea \u05d4\u05d5\u05dc\u05d9\u05d3\u05e6\u05d9\u05d4. comp.ts \u05d1\u05d8\u05de\u05e4\u05dc\u05d8 \u05e0\u05e9\u05ea\u05de\u05e9 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