Convert camelCaseText to Title Case Text – Even if we have a good project plan and a logical concept, we will spend the majority of our time correcting errors abaout and . Furthermore, our application can run without obvious errors with JavaScript, we must use various ways to ensure that everything is operating properly. In general, there are two types of errors that you’ll encounter while doing something wrong in code: Syntax Errors and Logic Errors. To make bug fixing easier, every JavaScript error is captured with a full stack trace and the specific line of source code marked. To assist you in resolving the JavaScript error, look at the discuss below to fix problem about Convert camelCaseText to Title Case Text.
Problem :
How can I convert a string either like ‘helloThere’ or ‘HelloThere’ to ‘Hello There’ in JavaScript?
Solution :
const text = 'helloThereMister';
const result = text.replace(/([A-Z])/g, " $1");
const finalResult = result.charAt(0).toUpperCase() + result.slice(1);
console.log(finalResult);capitalize the first letter – as an example. Note the space in " $1".
Of course, in case the first letter is already capital – you would have a spare space to remove.
Alternatively using lodash:
lodash.startCase(str);
Example:
_.startCase('helloThere');
// ➜ 'Hello There'
Lodash is a fine library to give shortcut to many everyday js tasks.There are many other similar string manipulation functions such as camelCase, kebabCase etc.
I had a similar problem and dealt with it like this:
stringValue.replace(/([A-Z]+)*([A-Z][a-z])/g, "$1 $2")
For a more robust solution:
stringValue.replace(/([A-Z]+)/g, " $1").replace(/([A-Z][a-z])/g, " $1")
Input:
helloThere
HelloThere
ILoveTheUSA
iLoveTheUSA
Output:
hello There
Hello There
I Love The USA
i Love The USA
Example without side effects.
function camel2title(camelCase) {
// no side-effects
return camelCase
// inject space before the upper case letters
.replace(/([A-Z])/g, function(match) {
return " " + match;
})
// replace first char with upper case
.replace(/^./, function(match) {
return match.toUpperCase();
});
}
In ES6
const camel2title = (camelCase) => camelCase
.replace(/([A-Z])/g, (match) => ` ${match}`)
.replace(/^./, (match) => match.toUpperCase())
.trim();
The best string I’ve found for testing camel-case-to-title-case functions is this ridiculously nonsensical example, which tests a lot of edge cases. To the best of my knowledge, none of the previously posted functions handle this correctly:
__ToGetYourGEDInTimeASongAboutThe26ABCsIsOfTheEssenceButAPersonalIDCardForUser_456InRoom26AContainingABC26TimesIsNotAsEasyAs123ForC3POOrR2D2Or2R2D
This should be converted to:
To Get Your GED In Time A Song About The 26 ABCs Is Of The Essence But A Personal ID Card For User 456 In Room 26A Containing ABC 26 Times Is Not As Easy As 123 For C3PO Or R2D2 Or 2R2D
If you want just a simple function that handles cases like the one above (and more cases than many of the previously answers), here’s the one I wrote. This code isn’t particularly elegant or fast, but it’s simple, understandable, and works.
The snippet below contains an online runnable example:
var mystrings = [ "__ToGetYourGEDInTimeASongAboutThe26ABCsIsOfTheEssenceButAPersonalIDCardForUser_456InRoom26AContainingABC26TimesIsNotAsEasyAs123ForC3POOrR2D2Or2R2D", "helloThere", "HelloThere", "ILoveTheUSA", "iLoveTheUSA", "DBHostCountry", "SetSlot123ToInput456", "ILoveTheUSANetworkInTheUSA", "Limit_IOC_Duration", "_This_is_a_Test_of_Network123_in_12__days_", "ASongAboutTheABCsIsFunToSing", "CFDs", "DBSettings", "IWouldLove1Apple", "Employee22IsCool", "SubIDIn", "ConfigureABCsImmediately", "UseMainNameOnBehalfOfSubNameInOrders" ];
// Take a single camel case string and convert it to a string of separate words (with spaces) at the camel-case boundaries.
//
// E.g.:
// __ToGetYourGEDInTimeASongAboutThe26ABCsIsOfTheEssenceButAPersonalIDCardForUser_456InRoom26AContainingABC26TimesIsNotAsEasyAs123ForC3POOrR2D2Or2R2D
// --> To Get Your GED In Time A Song About The 26 ABCs Is Of The Essence But A Personal ID Card For User 456 In Room 26A Containing ABC 26 Times Is Not As Easy As 123 For C3PO Or R2D2 Or 2R2D
// helloThere --> Hello There
// HelloThere --> Hello There
// ILoveTheUSA --> I Love The USA
// iLoveTheUSA --> I Love The USA
// DBHostCountry --> DB Host Country
// SetSlot123ToInput456 --> Set Slot 123 To Input 456
// ILoveTheUSANetworkInTheUSA --> I Love The USA Network In The USA
// Limit_IOC_Duration --> Limit IOC Duration
// This_is_a_Test_of_Network123_in_12_days --> This Is A Test Of Network 123 In 12 Days
// ASongAboutTheABCsIsFunToSing --> A Song About The ABCs Is Fun To Sing
// CFDs --> CFDs
// DBSettings --> DB Settings
// IWouldLove1Apple --> I Would Love 1 Apple
// Employee22IsCool --> Employee 22 Is Cool
// SubIDIn --> Sub ID In
// ConfigureCFDsImmediately --> Configure CFDs Immediately
// UseTakerLoginForOnBehalfOfSubIDInOrders --> Use Taker Login For On Behalf Of Sub ID In Orders
//
function camelCaseToTitleCase(in_camelCaseString) {
var result = in_camelCaseString // "__ToGetYourGEDInTimeASongAboutThe26ABCsIsOfTheEssenceButAPersonalIDCardForUser_456InRoom26AContainingABC26TimesIsNotAsEasyAs123ForC3POOrR2D2Or2R2D"
.replace(/(_)+/g, ' ') // " ToGetYourGEDInTimeASongAboutThe26ABCsIsOfTheEssenceButAPersonalIDCardForUser 456InRoom26AContainingABC26TimesIsNotAsEasyAs123ForC3POOrR2D2Or2R2D"
.replace(/([a-z])([A-Z][a-z])/g, "$1 $2") // " To Get YourGEDIn TimeASong About The26ABCs IsOf The Essence ButAPersonalIDCard For User456In Room26AContainingABC26Times IsNot AsEasy As123ForC3POOrR2D2Or2R2D"
.replace(/([A-Z][a-z])([A-Z])/g, "$1 $2") // " To Get YourGEDIn TimeASong About The26ABCs Is Of The Essence ButAPersonalIDCard For User456In Room26AContainingABC26Times Is Not As Easy As123ForC3POOr R2D2Or2R2D"
.replace(/([a-z])([A-Z]+[a-z])/g, "$1 $2") // " To Get Your GEDIn Time ASong About The26ABCs Is Of The Essence But APersonal IDCard For User456In Room26AContainingABC26Times Is Not As Easy As123ForC3POOr R2D2Or2R2D"
.replace(/([A-Z]+)([A-Z][a-z][a-z])/g, "$1 $2") // " To Get Your GEDIn Time A Song About The26ABCs Is Of The Essence But A Personal ID Card For User456In Room26A ContainingABC26Times Is Not As Easy As123ForC3POOr R2D2Or2R2D"
.replace(/([a-z]+)([A-Z0-9]+)/g, "$1 $2") // " To Get Your GEDIn Time A Song About The 26ABCs Is Of The Essence But A Personal ID Card For User 456In Room 26A Containing ABC26Times Is Not As Easy As 123For C3POOr R2D2Or 2R2D"
// Note: the next regex includes a special case to exclude plurals of acronyms, e.g. "ABCs"
.replace(/([A-Z]+)([A-Z][a-rt-z][a-z]*)/g, "$1 $2") // " To Get Your GED In Time A Song About The 26ABCs Is Of The Essence But A Personal ID Card For User 456In Room 26A Containing ABC26Times Is Not As Easy As 123For C3PO Or R2D2Or 2R2D"
.replace(/([0-9])([A-Z][a-z]+)/g, "$1 $2") // " To Get Your GED In Time A Song About The 26ABCs Is Of The Essence But A Personal ID Card For User 456In Room 26A Containing ABC 26Times Is Not As Easy As 123For C3PO Or R2D2Or 2R2D"
// Note: the next two regexes use {2,} instead of + to add space on phrases like Room26A and 26ABCs but not on phrases like R2D2 and C3PO"
.replace(/([A-Z]{2,})([0-9]{2,})/g, "$1 $2") // " To Get Your GED In Time A Song About The 26ABCs Is Of The Essence But A Personal ID Card For User 456 In Room 26A Containing ABC 26 Times Is Not As Easy As 123 For C3PO Or R2D2 Or 2R2D"
.replace(/([0-9]{2,})([A-Z]{2,})/g, "$1 $2") // " To Get Your GED In Time A Song About The 26 ABCs Is Of The Essence But A Personal ID Card For User 456 In Room 26A Containing ABC 26 Times Is Not As Easy As 123 For C3PO Or R2D2 Or 2R2D"
.trim() // "To Get Your GED In Time A Song About The 26 ABCs Is Of The Essence But A Personal ID Card For User 456 In Room 26A Containing ABC 26 Times Is Not As Easy As 123 For C3PO Or R2D2 Or 2R2D"
;
// capitalize the first letter
return result.charAt(0).toUpperCase() + result.slice(1);
}
for (var i = 0; i < mystrings.length; i++) {
jQuery(document.body).append("<br />"")