Definition properties

A property has one stable URL even when several definition types declare it with distinct defaults or descriptions.

• acceptedTypesAn `accept` list — image/*, .pdf — offered to the picker and enforced.
• addPanelTextAvailable on 1 types
• addRowTextAvailable on 1 types
• allowAddPanelAvailable on 1 types
• allowAddRowsAvailable on 1 types
• allowCameraCaptureOffer the camera as well as the filesystem, where the platform has one.
• allowDigitsSet false to reject an answer containing any digit.
• allowMultipleAvailable on 1 types
• allowRemovePanelAvailable on 1 types
• allowRemoveRowsAvailable on 1 types
• allowResizeWhether the respondent may drag the field taller.
• alternateRowsShade alternate rows. Presentation only.
• altTextFalls back to the title, then to empty — a decorative image.
• autoFocusFirstQuestionGive the first question on each page focus as the page arrives.
• autoGrowGrow to fit the answer rather than scrolling.
• backgroundColorEmpty is transparent, which is what a signature on a form usually wants.
• blankSizeDefault blank width in characters. A blank size wins.
• caseSensitiveRequire matching case when marking by text. Off by default: an assessment marking "paris" wrong is measuring typing rather than the subject.
• checkErrorsModeonNextPage, onValueChanged or onComplete.
• choicesByUrlURL to load choices from; may interpolate {question} placeholders.
• choicesFromQuestionName of a select question whose choices are carried forward.
• choicesFromQuestionModeall, selected or unselected.
• choicesLazyLoadEnabledThe list arrives a page at a time from the host loader.
• choicesLazyLoadPageSizeHow many choices one page asks for.
• choicesOrdernone, asc or desc.
• choicesPathDotted path to the array inside the response.
• choicesTitleNameAvailable on 8 types
• choicesValueNameAvailable on 8 types
• clearInvisibleValuesnone, onHidden or onComplete. What happens to an unreachable answer.
• colCountHow many columns the elements flow into.
• columnThe column summarised.
• completedHtmlMarkup shown once the survey is finished. {name} resolves to an answer.
• confirmDeleteRemoving a row asks first. A row can hold a lot of typing.
• confirmDeleteTextAvailable on 2 types
• contentModeimage or video.
• correctAnswerThe answer that scores. A question without one is not part of the quiz. Never shown.
• currencyAvailable on 1 types
• defaultPanelValueAnswers a new instance starts with, keyed by question name.
• defaultRowValueAnswers a new row starts with, keyed by column name.
• defaultValueExpressionExpression supplying a value while the question is unanswered.
• defaultValueFromLastRowA new row starts as a copy of the one before it. Wins over defaultRowValue.
• descriptionAvailable on 2 types
• detailPanelModenone, underRow, or underRowSingle (one row open at a time).
• displayModeauto, buttons or dropdown. auto collapses a long scale.
• displayStylenone, decimal, currency, percent or date.
• eachRowUniqueNo two rows may be answered with the same column.
• emptyHtmlMarkup shown when no page is visible, so there is nothing to answer.
• enableIfExpression; the element is editable only while it evaluates truthy.
• expressionComputed from the answers. The respondent does not supply it.
• formatTemplate around the result, with {0} standing for it.
• fromNameAvailable on 1 types
• goNextPageAutomaticTurn the page once every question on it has a one-step answer.
• gotoNamePage name, or a question name whose page is navigated to.
• htmlMarkup, rendered as markup. See HtmlElement on the trust boundary.
• imageFitnone, contain, cover or fill. Mirrors CSS object-fit.
• imageHeightAvailable on 2 types
• imageLinkPicture or video for this choice. Only an imagepicker draws it.
• imageWidthCSS pixels. 0 lets layout decide.
• includeIntoResultWhether the computed value joins the survey answers.
• inputTypetext, number, email, date, datetime-local, time, tel, url, color, range or password.
• isAllRowRequiredEvery visible row demands an answer, not just the question as a whole.
• isRequiredAvailable on 23 types
• itemSizeDefault field width in characters. An item size wins.
• kindsum, count, min, max or avg.
• labelFalseAvailable on 1 types
• labelTrueAvailable on 1 types
• loadingHtmlMarkup shown while the host reports the survey as loading.
• localeBCP-47 tag the survey opens in. Which one a respondent switches to afterwards is not part of the definition.
• maxUpper bound, read the same way as min.
• maxCountAvailable on 1 types
• maxFileCount0 means no limit.
• maximumFractionDigits0 leaves it to the style.
• maxLengthLength budget. 0 means none, which also hides the counter.
• maxPanelCount0 means no limit.
• maxRateDescriptionAvailable on 1 types
• maxRowCount0 means no limit.
• maxSelectedChoices0 means no limit.
• maxSizeBytes. 0 means no limit.
• maxTimeToFinishSeconds allowed for this page. 0 falls back to the survey's default.
• maxTimeToFinishPageSeconds allowed for a page that does not state its own. 0 means untimed.
• maxValueOmit for no upper bound.
• minLower bound. A number for numeric types, an ISO string for date ones.
• minCountAvailable on 1 types
• minLengthAvailable on 1 types
• minPanelCountInstances shown before the respondent adds any, and the floor on removal.
• minRateDescriptionAvailable on 1 types
• minRowCountRows shown before the respondent adds any, and the floor on removal.
• minValueOmit for no lower bound.
• minWidthCSS length.
• mobileModeauto, table or list. auto turns the table into a list on a narrow screen.
• multiSelectThe one select type whose arity is a property rather than its type.
• nameThe name this value is referenced by in expressions.
• noneTextAvailable on 8 types
• otherTextAvailable on 8 types
• panelTitleFormatInstance heading template, with {0} as its number.
• penColorAvailable on 1 types
• placeholderAvailable on 11 types
• precisionDecimal places shown.
• progressBarTypepages, questions or requiredQuestions.
• questionErrorLocationWhether a question draws its errors above its input or below it.
• questionsOnPageModestandard, singlePage or questionPerPage.
• rateMaxAvailable on 1 types
• rateMinAvailable on 1 types
• rateStepAvailable on 1 types
• rateTypelabels, stars or smileys.
• readOnlyThe answer is shown but cannot be changed by the respondent.
• regexPattern the answer must match. Applied with the unicode flag.
• removePanelTextAvailable on 1 types
• removeRowTextAvailable on 1 types
• renderAsswitch or radio.
• renderModelist shows every instance; tab and progress show one at a time.
• requiredErrorTextReplaces the built-in message shown when a required answer is missing.
• requiredIfExpression; when present it overrides isRequired.
• resetValueIfExpression; while truthy the answer is cleared. Wins over the others.
• rowsVisible height, in lines.
• rowTitleFormatRow header template, with {0} as the row number.
• runExpressionAvailable on 1 types
• searchEnabledWhether a long list may be narrowed by typing.
• selectAllTextAvailable on 4 types
• selectToRankAreasLayouthorizontal or vertical. Where the pool sits relative to the ranking.
• selectToRankEnabledChoices start in a pool and are ranked only once placed.
• setToNameAvailable on 3 types
• setValueLiteral written to setToName.
• setValueExpressionAvailable on 22 types
• setValueIfExpression; while truthy, setValueExpression drives the answer.
• showClearButtonAvailable on 1 types
• showLabelWhether the choice text is shown. It is the tile name either way.
• showNoneItemAvailable on 8 types
• showOtherItemAvailable on 8 types
• showPreviewAvailable on 1 types
• showPreviewBeforeCompletenoPreview, showAllQuestions or showAnsweredQuestions.
• showProgressBaroff, top, bottom or both.
• showSelectAllItemAvailable on 4 types
• showTimerPanelnone, top or bottom.
• showTimerPanelModepage, survey or all. Which clocks the panel shows.
• showTOCOffer a list of pages the respondent can jump between.
• signatureFormatpng, jpeg or svg.
• signatureHeightAvailable on 1 types
• signatureWidthAvailable on 1 types
• sizeWidth in characters. 0 uses itemSize.
• startWithNewLineBreak onto a fresh row rather than flowing into the columns beside it.
• statedefault, expanded or collapsed. Collapsed panels start closed.
• step0 lets the browser choose.
• storeDataAsTextThe content travels inside the response instead of being uploaded.
• templateProse with [[name]] marking each blank. Translators may move a marker.
• textDisplay text; falls back to the value.
• textDirectionauto, ltr or rtl. auto reads the direction off the locale.
• titleDisplay label; falls back to name.
• titleLocationdefault, top, left or hidden. Hidden is visual only; it is still announced.
• trimIgnore surrounding whitespace when marking by text.
• validationEnabledSet false to stop validation blocking navigation or completion.
• valueAvailable on 1 types
• valueFalseAvailable on 1 types
• valueNameAnswer key, when it should differ from the name. Shared keys share an answer.
• valueTrueWhat is stored for yes. Anything the host backend expects.
• visibleIfExpression; the choice is offered only while truthy.
• widthCSS length. Empty fills its column.