Semantic-Org/Semantic-UI · warning

{name} must be exactly "{ruleValue}"

Error message

{name} must be exactly "{ruleValue}"

What it means

Default prompt for the Semantic UI Form `isExactly` rule (settings.rules.isExactly, form.js:1435). Performs case-SENSITIVE equality between the value and `{ruleValue}`. Shown when they are not strictly equal (including case).

Source

Thrown at src/definitions/behaviors/form.js:1263

    url     : /(https?:\/\/(?:www\.|(?!www))[^\s\.]+\.[^\s]{2,}|www\.[^\s]+\.[^\s]{2,})/i
  },

  text: {
    unspecifiedRule  : 'Please enter a valid value',
    unspecifiedField : 'This field'
  },

  prompt: {
    empty                : '{name} must have a value',
    checked              : '{name} must be checked',
    email                : '{name} must be a valid e-mail',
    url                  : '{name} must be a valid url',
    regExp               : '{name} is not formatted correctly',
    integer              : '{name} must be an integer',
    decimal              : '{name} must be a decimal number',
    number               : '{name} must be set to a number',
    is                   : '{name} must be "{ruleValue}"',
    isExactly            : '{name} must be exactly "{ruleValue}"',
    not                  : '{name} cannot be set to "{ruleValue}"',
    notExactly           : '{name} cannot be set to exactly "{ruleValue}"',
    contain              : '{name} must contain "{ruleValue}"',
    containExactly       : '{name} must contain exactly "{ruleValue}"',
    doesntContain        : '{name} cannot contain  "{ruleValue}"',
    doesntContainExactly : '{name} cannot contain exactly "{ruleValue}"',
    minLength            : '{name} must be at least {ruleValue} characters',
    length               : '{name} must be at least {ruleValue} characters',
    exactLength          : '{name} must be exactly {ruleValue} characters',
    maxLength            : '{name} cannot be longer than {ruleValue} characters',
    match                : '{name} must match {ruleValue} field',
    different            : '{name} must have a different value than {ruleValue} field',
    creditCard           : '{name} must be a valid credit card number',
    minCount             : '{name} must have at least {ruleValue} choices',
    exactCount           : '{name} must have exactly {ruleValue} choices',
    maxCount             : '{name} must have {ruleValue} or less choices'
  },

View on GitHub (pinned to 597843ab84)

Solutions

1. Type the exact expected string including case.
2. If case should not matter, switch to the `is` rule.
3. Normalize the value (e.g. strip zero-width chars) before validation.
4. Provide a custom `prompt`.

Example fix

// before
rules: [{ type: 'isExactly[Admin]' }]  // 'admin' fails

// after
rules: [{ type: 'isExactly[Admin]', prompt: 'Type exactly: Admin' }]

const expected = 'Admin';
if ($field.val() !== expected) { /* warn */ }

const matchesExactly = (v, t) => v === t;

When it happens

Trigger: `{type:'isExactly[Admin]'}` with input `admin`, `ADMIN`, or any different string.

Common situations: Case-sensitive confirmations (security codes, role names), users pasting with auto-correct changing case, or copy-paste introducing invisible characters.

Related errors

• {name} must be "{ruleValue}"
• {name} cannot be set to exactly "{ruleValue}"
• {name} must contain exactly "{ruleValue}"
• {name} cannot contain exactly "{ruleValue}"
• {name} must be a valid url

AI-assisted analysis of Semantic-Org/Semantic-UI@597843ab84 (2026-08-13). Data as JSON: /api/errors/3837d9c0dc2b6af8. Report an issue: GitHub.