How to translate form errors with angular i18n? -


i working on i18n angular , provide translation form errors. not know how that. followed guide angular website. , tried use select method not working.

initially, before trying translate, had following code in component.ts:

onvaluechanged(data?: any) {   if (!this.userform) { return; }   const form = this.userform;    (const field in this.formerrors) {     // clear previous error message (if any)     this.formerrors[field] = '';     const control = form.get(field);      if (control && control.dirty && !control.valid) {       const messages = this.validationmessages[field];       (const key in control.errors) {         this.formerrors[field] += messages[key] + ' ';       }     }   } }  formerrors = {   'firstname': '' };  validationmessages = {    'firstname': {      'required': 'firstname required.',      'pattern': 'only alphabetics caracters allowed.'    } };

and following code in component.html:

<div *ngif="formerrors.firstname" class="form-control-feedback alert">   {{ formerrors.firstname }} </div>

it worked because there no translation. then, made following updates:

in component.ts:

validationmessages = {   'firstname': {     'required': 'required',     'pattern': 'pattern'   } };

in component.html:

<div *ngif="formerrors.firstname" class="form-control-feedback alert">   <ng-container i18n="@@usermodalfirstnameerror">     {formerrors.firstname, select, required {required} pattern {pattern}}   </ng-container> </div>

in messages.fr.xlf file, have this:

<trans-unit id="usermodalfirstnameerror" datatype="html">   <source>{var_select, select, required {required} pattern {pattern} }</source>   <target>     {var_select, select, required {nom utilisateur obligatoire} pattern {pattern}}   </target>   ... </trans-unit>

unfortunately, solution not work.

i found issue comes from. actually, there 2 mistakes.

  1. the first 1 related 'var_select' in .xlf file. has been generated angular build command => "ng-xi18n --i18nformat=xlf". 'var_select' works if "direct" variable used (for example if put "{toto, select, required {required} pattern {pattern}}" , toto equal "required"). seems not work if variable table used (which case variable "formerrors.firstname"). replaced 'var_select' in .xlf file name of variable 'formerrors.firstname'.

  2. the second 1 in "onvaluechanged" function:

    for (const key in control.errors) {   this.formerrors[field] += messages[key] + ' '; }

    because of space character @ end, variable did not match 1 of values defined (for example, 'required ' expected 'required'. note additional space @ end of 1st value)


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