自动调整通过 renderUI 创建的 textAreaInput
Auto-resize textAreaInput created through renderUI
我正在尝试调整 textAreaInput
的大小,以便它们默认显示整个区域的内容。在此之后,,我可以使用在 ui 下创建的 textAreaInput
(例如,textAreaInput
适当调整大小)。当创建 textAreaInput
作为 renderUI
的一部分时,我无法让它工作(如 textAreaInput
不调整大小),更不用说作为模块的一部分了。如果有帮助,我很乐意使用 shinyjs
。
这里的根本问题是我不明白Javascript。
在这两种情况下,使用:
jc <- "document.addEventListener('DOMContentLoaded', function(event) {
var observe;
if (window.attachEvent) {
observe = function (element, event, handler) {
element.attachEvent('on'+event, handler);
};
}
else {
observe = function (element, event, handler) {
element.addEventListener(event, handler, false);
};
}
function init () {
var text = document.getElementById('text');
function resize () {
text.style.height = 'auto';
text.style.height = text.scrollHeight+'px';
}
/* 0-timeout to get the already changed text */
function delayedResize () {
window.setTimeout(resize, 0);
}
observe(text, 'change', resize);
observe(text, 'cut', delayedResize);
observe(text, 'paste', delayedResize);
observe(text, 'drop', delayedResize);
observe(text, 'keydown', delayedResize);
text.focus();
text.select();
resize();
};init()
})
"
这与在 ui 下创建的 textAreaInput
将根据输入或粘贴调整大小:
library(shiny)
ui <- fluidPage(
shiny::tags$script(jc),
textAreaInput(inputId = "text", label = "a", value = "b")
# uiOutput("tai")
)
server <- function(input, output, session) {
# output$tai <- renderUI({
# textAreaInput(inputId = "text", label = "a", value = "b")
# })
}
shinyApp(ui, server)
虽然在服务器端 renderUI
中创建的 textAreaInput
不会自动调整大小:
library(shiny)
ui <- fluidPage(
shiny::tags$script(jc),
# textAreaInput(inputId = "text", label = "a", value = "b")
uiOutput("tai")
)
server <- function(input, output, session) {
output$tai <- renderUI({
textAreaInput(inputId = "text", label = "a", value = "b")
})
}
shinyApp(ui, server)
您可以通过将 init()
替换为 setTimeout(function(){init();}, 500);
来包括延迟:
jc <- "document.addEventListener('DOMContentLoaded', function(event) {
var observe;
if (window.attachEvent) {
observe = function (element, event, handler) {
element.attachEvent('on'+event, handler);
};
} else {
observe = function (element, event, handler) {
element.addEventListener(event, handler, false);
};
}
function init () {
var text = document.getElementById('text');
function resize () {
text.style.height = 'auto';
text.style.height = text.scrollHeight+'px';
}
/* 0-timeout to get the already changed text */
function delayedResize () {
window.setTimeout(resize, 0);
}
observe(text, 'change', resize);
observe(text, 'cut', delayedResize);
observe(text, 'paste', delayedResize);
observe(text, 'drop', delayedResize);
observe(text, 'keydown', delayedResize);
text.focus();
text.select();
resize();
};
setTimeout(function(){init();}, 500);
})
"
我正在尝试调整 textAreaInput
的大小,以便它们默认显示整个区域的内容。在此之后,textAreaInput
(例如,textAreaInput
适当调整大小)。当创建 textAreaInput
作为 renderUI
的一部分时,我无法让它工作(如 textAreaInput
不调整大小),更不用说作为模块的一部分了。如果有帮助,我很乐意使用 shinyjs
。
这里的根本问题是我不明白Javascript。
在这两种情况下,使用:
jc <- "document.addEventListener('DOMContentLoaded', function(event) {
var observe;
if (window.attachEvent) {
observe = function (element, event, handler) {
element.attachEvent('on'+event, handler);
};
}
else {
observe = function (element, event, handler) {
element.addEventListener(event, handler, false);
};
}
function init () {
var text = document.getElementById('text');
function resize () {
text.style.height = 'auto';
text.style.height = text.scrollHeight+'px';
}
/* 0-timeout to get the already changed text */
function delayedResize () {
window.setTimeout(resize, 0);
}
observe(text, 'change', resize);
observe(text, 'cut', delayedResize);
observe(text, 'paste', delayedResize);
observe(text, 'drop', delayedResize);
observe(text, 'keydown', delayedResize);
text.focus();
text.select();
resize();
};init()
})
"
这与在 ui 下创建的 textAreaInput
将根据输入或粘贴调整大小:
library(shiny)
ui <- fluidPage(
shiny::tags$script(jc),
textAreaInput(inputId = "text", label = "a", value = "b")
# uiOutput("tai")
)
server <- function(input, output, session) {
# output$tai <- renderUI({
# textAreaInput(inputId = "text", label = "a", value = "b")
# })
}
shinyApp(ui, server)
虽然在服务器端 renderUI
中创建的 textAreaInput
不会自动调整大小:
library(shiny)
ui <- fluidPage(
shiny::tags$script(jc),
# textAreaInput(inputId = "text", label = "a", value = "b")
uiOutput("tai")
)
server <- function(input, output, session) {
output$tai <- renderUI({
textAreaInput(inputId = "text", label = "a", value = "b")
})
}
shinyApp(ui, server)
您可以通过将 init()
替换为 setTimeout(function(){init();}, 500);
来包括延迟:
jc <- "document.addEventListener('DOMContentLoaded', function(event) {
var observe;
if (window.attachEvent) {
observe = function (element, event, handler) {
element.attachEvent('on'+event, handler);
};
} else {
observe = function (element, event, handler) {
element.addEventListener(event, handler, false);
};
}
function init () {
var text = document.getElementById('text');
function resize () {
text.style.height = 'auto';
text.style.height = text.scrollHeight+'px';
}
/* 0-timeout to get the already changed text */
function delayedResize () {
window.setTimeout(resize, 0);
}
observe(text, 'change', resize);
observe(text, 'cut', delayedResize);
observe(text, 'paste', delayedResize);
observe(text, 'drop', delayedResize);
observe(text, 'keydown', delayedResize);
text.focus();
text.select();
resize();
};
setTimeout(function(){init();}, 500);
})
"