51 lines
1.5 KiB
Markdown
51 lines
1.5 KiB
Markdown
**If / Else Statements**
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If / else statements are useful when you want to conditionally render attributes or elements / components.
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htmgo provides a couple of utilities to do so:
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```go
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h.If(condition, node)
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h.Ternary(condition, node, node2)
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h.ElementIf(condition, element) // this is neccessary if a method requires you to pass in *h.element
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h.IfElse(condition, node, node2) //essentially an alias to h.Ternary
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h.IfElseLazy(condition, func()node, func()node2) // useful for if something should only be called based on the condition
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h.AttributeIf(condition, key string, value string) // adds an attribute if condition is true
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h.ClassIf(condition, class string) // adds a class if condition is true
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h.ClassX(classes, m.ClassMap{}) // allows you to include classes, but also render specific classes conditionally
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```
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**Examples:**
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- Render `border-green-500` or `border-slate-400` conditionally
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```go
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h.ClassX("w-10 h-10 border rounded-full", map[string]bool {
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"border-green-500": task.CompletedAt != nil,
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"border-slate-400": task.CompletedAt == nil,
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})
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```
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- Render an icon if the task is complete
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```go
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h.If(task.CompletedAt != nil, CompleteIcon())
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```
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- Render different elements based on a condition
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```go
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h.IfElse(editing, EditTaskForm(), ViewTask())
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```
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Note: This will execute both **EditTaskForm** and **ViewTask**, no matter if the condition is true or false, since a function is being called here.
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If you do not want to call the function at all unless the condition is true, use **h.IfElseLazy**
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```go
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h.IfElseLazy(editing, EditTaskForm, ViewTask)
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```
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