Understanding Javascript Function Parameters During Event Handling in R Package: visNetwork
Admittedly, I don't quite have the strongest grasp on JavScript, but it's used in this R package that I'm working with. I don't understand how function calls work during event handling, in this case. My code is below.
The way the package works, is that I have to give it a data frame of nodes (which must contain a column called 'id') and a data frame of edges (which must contain columns 'from' and 'to'). It'll print out an interactive network, that can be tweaked with Javascript.
In the code, visEvents() enables event handling, and 'selectNode' is one of the events (Please see here for more info https://rdrr.io/cran/visNetwork/man/visEvents.html).
library(visNetwork)
nodes2 <- data.frame(id = 1:3)
edges2 <- data.frame(from = c(1,2), to = c(1,3))
visNetwork(nodes2, edges2) %>%
visEvents(selectNode = "function(properties) {
alert('selected nodes: ' + properties.nodes);}",
dragEnd = "function() {
alert('finish to drag');}")
My question is, when a node is selected, and the function is called, what exactly is being passed to the function? What is 'properties', and why does it have a quality called 'nodes'? In the website linked above, the example uses a different event. The only difference between my code and theirs is I changed the 'select' event to the 'selectNode' event. But the code still works, so I'm confused about what that 'properties' parameter is supposed to mean.
Edit: I would appreciate it if someone could also let me know where I can read more about this. I don't quite know what this process is called so I can't even google it.
javascript r event-handling
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
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Admittedly, I don't quite have the strongest grasp on JavScript, but it's used in this R package that I'm working with. I don't understand how function calls work during event handling, in this case. My code is below.
The way the package works, is that I have to give it a data frame of nodes (which must contain a column called 'id') and a data frame of edges (which must contain columns 'from' and 'to'). It'll print out an interactive network, that can be tweaked with Javascript.
In the code, visEvents() enables event handling, and 'selectNode' is one of the events (Please see here for more info https://rdrr.io/cran/visNetwork/man/visEvents.html).
library(visNetwork)
nodes2 <- data.frame(id = 1:3)
edges2 <- data.frame(from = c(1,2), to = c(1,3))
visNetwork(nodes2, edges2) %>%
visEvents(selectNode = "function(properties) {
alert('selected nodes: ' + properties.nodes);}",
dragEnd = "function() {
alert('finish to drag');}")
My question is, when a node is selected, and the function is called, what exactly is being passed to the function? What is 'properties', and why does it have a quality called 'nodes'? In the website linked above, the example uses a different event. The only difference between my code and theirs is I changed the 'select' event to the 'selectNode' event. But the code still works, so I'm confused about what that 'properties' parameter is supposed to mean.
Edit: I would appreciate it if someone could also let me know where I can read more about this. I don't quite know what this process is called so I can't even google it.
javascript r event-handling
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
New contributor
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Admittedly, I don't quite have the strongest grasp on JavScript, but it's used in this R package that I'm working with. I don't understand how function calls work during event handling, in this case. My code is below.
The way the package works, is that I have to give it a data frame of nodes (which must contain a column called 'id') and a data frame of edges (which must contain columns 'from' and 'to'). It'll print out an interactive network, that can be tweaked with Javascript.
In the code, visEvents() enables event handling, and 'selectNode' is one of the events (Please see here for more info https://rdrr.io/cran/visNetwork/man/visEvents.html).
library(visNetwork)
nodes2 <- data.frame(id = 1:3)
edges2 <- data.frame(from = c(1,2), to = c(1,3))
visNetwork(nodes2, edges2) %>%
visEvents(selectNode = "function(properties) {
alert('selected nodes: ' + properties.nodes);}",
dragEnd = "function() {
alert('finish to drag');}")
My question is, when a node is selected, and the function is called, what exactly is being passed to the function? What is 'properties', and why does it have a quality called 'nodes'? In the website linked above, the example uses a different event. The only difference between my code and theirs is I changed the 'select' event to the 'selectNode' event. But the code still works, so I'm confused about what that 'properties' parameter is supposed to mean.
Edit: I would appreciate it if someone could also let me know where I can read more about this. I don't quite know what this process is called so I can't even google it.
javascript r event-handling
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
New contributor
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Admittedly, I don't quite have the strongest grasp on JavScript, but it's used in this R package that I'm working with. I don't understand how function calls work during event handling, in this case. My code is below.
The way the package works, is that I have to give it a data frame of nodes (which must contain a column called 'id') and a data frame of edges (which must contain columns 'from' and 'to'). It'll print out an interactive network, that can be tweaked with Javascript.
In the code, visEvents() enables event handling, and 'selectNode' is one of the events (Please see here for more info https://rdrr.io/cran/visNetwork/man/visEvents.html).
library(visNetwork)
nodes2 <- data.frame(id = 1:3)
edges2 <- data.frame(from = c(1,2), to = c(1,3))
visNetwork(nodes2, edges2) %>%
visEvents(selectNode = "function(properties) {
alert('selected nodes: ' + properties.nodes);}",
dragEnd = "function() {
alert('finish to drag');}")
My question is, when a node is selected, and the function is called, what exactly is being passed to the function? What is 'properties', and why does it have a quality called 'nodes'? In the website linked above, the example uses a different event. The only difference between my code and theirs is I changed the 'select' event to the 'selectNode' event. But the code still works, so I'm confused about what that 'properties' parameter is supposed to mean.
Edit: I would appreciate it if someone could also let me know where I can read more about this. I don't quite know what this process is called so I can't even google it.
javascript r event-handling
javascript r event-handling
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
New contributor
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
New contributor
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
New contributor
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
asked Jan 18 at 17:45
Zuhaib AhmedZuhaib Ahmed
12
12
New contributor
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Zuhaib Ahmed is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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